Robustness fix and license updates
- Update Makefile to use current version of GCC as defined in
bsd.default-versions.mk. (USE_GCC=yes)
- Update Makefile with LICENSE and LICENSE_PERMS information and remove
RESTRICTED and NO_CDROM (redundant)
- Update Makefile PORTREVISION
While here, pet portlint
PR: 243142
Submitted by: thomas@bsdunix.ch
Approved by: michael@fuckner.net (maintainer)