add microblaze handling

test/Rules.mak

@@ -24,6 +24,7 @@ TARGET_ARCH:=$(shell $(CC) -dumpmachine | sed -e s'/-.*//' \
 	-e 's/parisc.*/hppa/' \
 	-e 's/ppc/powerpc/g' \
 	-e 's/sh[234]/sh/' \
+	-e 's/microblaze.*/microblaze/' \
 	-e 's/mips.*/mips/' \
 	-e 's/cris.*/cris/' \
 	-e 's/xtensa.*/xtensa/' \