Merge commit '7a76c6c4'

* commit '7a76c6c4':
  configure: Enable colored output for gcc 4.9+

Conflicts:
	configure
Merged-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -5326,6 +5326,7 @@ elif enabled gcc; then
     check_cflags -Werror=return-type
     check_cflags -Werror=vla
     check_cflags -Wformat
+    check_cflags -fdiagnostics-color=auto
     enabled extra_warnings || check_disable_warning -Wno-maybe-uninitialized
 elif enabled llvm_gcc; then
     check_cflags -mllvm -stack-alignment=16