Include "golang-hello-world" in gcc's tests (since it contains gccgo)

test/config.sh

@@ -68,6 +68,7 @@ imageTests+=(
 	[gcc]='
 		gcc-c-hello-world
 		gcc-cpp-hello-world
+		golang-hello-world
 	'
 	[golang]='
 		golang-hello-world