add compiler from crosstool, too

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1766 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

util/abuild/abuild.sh

@@ -230,7 +230,8 @@ function build_target
 			found_crosscompiler=true
 		fi
 		if [ "$found_crosscompiler" == "false" -a "$TARCH" == ppc ];then
-			for prefix in powerpc-eabi- powerpc-linux- ppc_74xx- ; do
+			for prefix in powerpc-eabi- powerpc-linux- ppc_74xx- \
+			    powerpc-7450-linux-gnu-; do
 				if ${prefix}gcc --version > /dev/null 2> /dev/null ; then
 					found_crosscompiler=true
 					CROSS_COMPILE=$prefix