* c-pch.c, dummy-conditions.c, genautomata.c, genconditions.c,
	langhooks.c, tree-inline.c, unwind-dw2-fde-darwin.c,
	unwind-dw2-fde-glibc.c, unwind-libunwind.c, vmsdbgout.c: Replace
	"GNU CC" with "GCC".

From-SVN: r64297