tree 1912675c98fdbe640f6e6dcd311417bfe1bd2887
parent 0dca20ad2292cd95f3a0d0c450e92c592ad9ec3d
author Cherry Zhang <cherryyz@google.com> 1528143908 -0400
committer Cherry Zhang <cherryyz@google.com> 1528244380 +0000

gollvm: support --gcc-toolchain flag

For explicitly specify GCC toolchain directory, similar to what
clang does.

Change-Id: I5afa14caff8768205040a001cd2cc2761d5453ce
Reviewed-on: https://go-review.googlesource.com/116219
Reviewed-by: Than McIntosh <thanm@google.com>