contrib/platformtest.sh: fix gcc version detection

Now the version of GNU C is detected correctly on SuSE Linux, too ...

contrib/platformtest.sh

@@ -96,8 +96,8 @@ if [ -r "Makefile" ]; then
 	CC=$(grep "^CC = " Makefile | cut -d' ' -f3)
 	$CC --version 2>&1 | grep -i "GCC" >/dev/null
 	if [ $? -eq 0 ]; then
-		COMPILER=$($CC --version | head -1 | awk "{ print \$3 }" \
-		 | cut -d'-' -f1)
+		COMPILER=$($CC --version | head -1 \
+		  | cut -d')' -f2 | cut -d' ' -f2)
 		COMPILER="gcc $COMPILER"
 	else
 		case "$CC" in