Uninstaller: update mount code

uninstaller/META-INF/com/google/android/update-binary

@@ -173,7 +173,7 @@ mount_partitions () {
 
 	if [ ! -f /system/build.prop ]; then
 		SYSTEMBLOCK=$(find /dev/block -iname system${SLOT} | head -n 1)
-		mount -t ext4 -o rw ${SYSTEMBLOCK} /system
+		mount -o rw ${SYSTEMBLOCK} /system
 	fi
 
 	[ -f /system/build.prop ] || is_mounted /system || error "failed to mount /system (unsupported A/B device?)"
@@ -190,7 +190,7 @@ mount_partitions () {
 		! is_mounted /vendor && mount /vendor
 		if ! is_mounted /vendor; then
 			VENDORBLOCK=$(find /dev/block -iname vendor${SLOT} | head -n 1)
-			mount -t ext4 -o ro ${VENDORBLOCK} /vendor
+			mount -o ro ${VENDORBLOCK} /vendor
 		fi
 	elif [ -d /system/vendor ]; then
 		### XXX work-around required for some ROMs