Fix machine guessing sed

git-svn-id: https://svn.o-hand.com/repos/poky/trunk@1159 311d38ba-8fff-0310-9ca6-ca027cbcb966

scripts/poky-qemu

@@ -37,7 +37,7 @@ else
 fi
 
 if [ "x$MACHINE" = "x" ]; then
-    MACHINE=`basename $ZIMAGE | sed -e 's#.*-\([a-z]*\)-*[0-9]*..*#\1#'`
+    MACHINE=`basename $ZIMAGE | sed -r -e 's#.*-([a-z]+)-?[0-9]*..*#\1#'`
 fi
 
 INTERNAL_SCRIPT=`which poky-qemu-internal`