Upgrade to 3.5.0 release.
Give the port a chance of building on more arm systems and powerpc64. 
Allow building on 9 in the default configuration as it works for me.
Disallow llvm35 on 8 due to bizzare gcc behavior.
PR: 191996 
Submitted by: email@example.com 
Sponsored by: DARPA, AFRL
(Only the first 10 of 12 ports in this commit are shown above. )
Add ports of LLVM and Clang 3.5rc1.
In the LLVM port the option to build cmake support files is disabled by
default because it fails to configure when built with gcc47.
The Clang port is marked broken if the compiler isn't clang due to link
errors when it is gcc47.