Update to the 20180303 snapshot of GCC 9.0.1. Simplify the creation of the multilib-related sub-directory tree on powerpc64 and avoid leaving an empty directory behind on the way. [1] Sync pkg-descr with lang/gcc7-devel, in particular after r442530 there. PR: 235964, 231804 [1] Discussed with: Piotr Kubaj <pkubaj@anongoth.pl> [1]
head/lang/gcc9-devel/Makefile
head/lang/gcc9-devel/distinfo
head/lang/gcc9-devel/pkg-descr