Base profile: Unmask GCC 5.4.0.

This requires a full rebuild of all packages.

Discussed for some number of weeks on Interlinked and tracker.

Signed-off-by: A. Wilcox <awilfox@adelielinux.org>
Signed-off-by: Elizabeth Myers <elizabeth@adelielinux.org>

profiles/base/package.accept_keywords

@@ -4,6 +4,7 @@
 =dev-util/cflow-1.4 **
 =sys-apps/less-483-r1 **
 =sys-apps/shadow-4.2.1-r2 **
+=sys-devel/gcc-5.4.0 **
 =sys-devel/m4-1.4.17 **
 =sys-kernel/linux-headers-4.4 **
 =sys-process/fcron-3.2.0-r1 **