Unbreak on i386/amd64 and update to 1.25.0-2018-02-19

- Stop using git to build as it is unmaintainable due to submodules,
  but more importantly because src/vendor is no longer bundled.  Just
  fetch the source already generated that has all dependencies bundled.
  It may be a bit slower to get updates but is far more maintainable.
- Copy all patches to lang/rust-nightly/files since they may not always
  apply exactly between both versions.
- Add in patch for llvm-config getting -lexecinfo wrong, this is in
  review with LLVM at https://reviews.llvm.org/D42702.
- Bring in other random updates from lang/rust.

PORT_LLVM was removed in lang/rust

Deprecate ports broken for more than 6 months

lang/rust-nightly: Inherit MAINTAINER from lang/rust

Thus, the new maintainer of this port is rust@FreeBSD.org.

lang/rust-nightly: Mark the port as broken

The port needs to be adapted after recent changes to lang/rust.

lang/rust, lang/rust-nightly: Generate PLIST in post-install

Several libraries have their filename computed and based on the absolute
path to source files. Therefore, we need to generate the PLIST. Rust
installer already produces manifests listing files it installs. The port
now uses those files to complete `${TMPPLIST}`.

While the port built fine in Poudriere, it failed when built directly on
the host (regular make or with portmaster(1)) or using a different tool
such as Synth. This commit fixes the build for those methods.

Handling of DOCS-specific files is also unified with normal files. This
gets rid of code duplication.

How to do reproducible builds will be studied later.

PR:		217309
Reported by:	Several people on freebsd-ports@ or Bugzilla
Tested by:	Almost everyone who reported the issue
Approved by:	antoine (mentor), riggs (maintainer of lang/rust)
Differential Revision:	https://reviews.freebsd.org/D9816

lang/rust*: Advise users to mount procfs

Add a pkg-message to these ports advising users to mount procfs to see
backtraces.

Reviewed by:	dumbbell, riggs
Approved by:	dumbbell (ports)
Sponsored by:	Spectra Logic Corp
Differential Revision:	https://reviews.freebsd.org/D9838

lang/rust, lang/rust-nightly: Update to 1.15.1 and 1.17.0 respectively

Both versions of Rust seen changes to their build system. Now they
require a bootstrap of Cargo and thus, a snapshot of Cargo's registry.

Each library has its own suffix instead of a common suffix for a given
version of Rust. Thus all future updates of the ports will include
changes to their plist.

$DISTFILES are now all under the `rust` directory in `$DISTDIR`. A
similar change will be committed to devel/cargo later.

lang/rust-nightly is enabled on i386 (bugzilla 216143). The source
snapshot also contains everything to build it on aarch64, but enabling
it will be committed later.

PR:		216143
Approved by:	riggs, bapt (mentor), antoine (mentor)
Differential Revision:	https://reviews.freebsd.org/D9286

More USE_GITHUB cleanup.

Use GH_SUBDIR, or GH_TUPLE, where applicable.

Sponsored by:	Absolight

lang/rust-nightly: Update to 1.12.0; snapshot from 2016-07-17

Reviewed by:	asomers, jbeich, riggs
Approved by:	jbeich, riggs
Differential Revision:	https://reviews.freebsd.org/D7275

- Mark BROKEN: no suitable checksum found for
rustc-1.9.0-x86_64-unknown-freebsd.tar.gz.

Reported by:	pkg-fallout
Approved by:	portmgr blanket

lang/rust-nightly: better rebase r412407 against r412305

BROKEN_FreeBSD_9 is already defined by master port.

Differential Revision:	https://reviews.freebsd.org/D5789

lang/rust: enslave lang/rust-nightly

* rust: drop no longer used RUST_SOURCE variable
* rust: apply rust-nightly FIXME comment about stage-qa (strip)
* rust-nightly: properly conflict for install with rust package
* rust-nightly: inherit |make test| support from r401025
* rust-nightly: as DOCSDIR is the same drop unnecessary DOCS option

Approved by:	riggs, dumbbell (maintainers)
Differential Revision:	https://reviews.freebsd.org/D5789

Remove ${PORTSDIR}/ from dependencies, categories h, i, j, k, and l.

With hat:	portmgr
Sponsored by:	Absolight

lang/rust: apply minor style

- Fix MIT view for LICENSES_ASK=1
- Convert BROKEN to new syntax
- Concatenate find(1) arguments and drop unnecessary `cd`

lang/rust-nightly: Update to 1.9.0.20160318

While here, relevant improvements made to lang/rust were copied.

PR:		204418, 206091
Reviewed by:	asomers, jbeich
Approved by:	asomers, jbeich
Differential Revision:	https://reviews.freebsd.org/D5766

lang/rust and lang/rust-nightly: Build-conflict with themselves

A newer version of Rust fails to build if an older version is installed
because the build process picks libraries in %%LOCALBASE%%/lib before
those from the build directory.

In the pkg-plist of both ports, `x86_64-unknown-freebsd` is now a
variable automatically set in the Makefile. This avoids the need for a
separate port for DragonFlyBSD. [1]

Still in the pkg-plist, RUST_VSN_HASH is automatically computed in the
lang/rust's Makefile, like it was already done for lang/rust-nightly.

lang/rust-nightly USES libedit. patch-mk_main.mk was copied from
lang/rust so the correct library is picked (ie. the one from Ports, not

lang/rust-nightly: New port for the nightly version of Rust

Differential Revision:	https://reviews.freebsd.org/D2798
Reviewed by:	jonathan, kwm
Approved by:	jonathan