CommonInstaller: fixup

CommonInstaller

@@ -248,7 +248,7 @@ mount_partitions () {
 		is_mounted /data || mount /data || error "failed to mount /data!"
 
 		mount -o bind /dev/urandom /dev/random
-		! is_mounted /system && mount -o rw /system${SLOT}
+		! is_mounted /system && mount -o rw system${SLOT}
 		! is_mounted /system && mount -o rw ${SYSTEM_BLOCK} /system
 		! is_mounted /system && error "failed to mount /system!"
 
@@ -265,7 +265,7 @@ mount_partitions () {
 		VENDOR_BLOCK=$(readlink -f ${vendor_tmp})
 		echo " INFO: #7 [VENDOR_BLOCK] ${VENDOR_BLOCK}"
 
-		! is_mounted /vendor && mount -o ro /vendor${SLOT} || mount -o ro ${VENDOR_BLOCK} /vendor
+		! is_mounted /vendor && mount -o ro vendor${SLOT} || mount -o ro ${VENDOR_BLOCK} /vendor
 
 		if [ -d /system/vendor -a ! is_mounted /vendor ]; then
 			### XXX work-around required for some ROMs