fs/ext2: add a symlink 'rootfs.ext#' -> 'rootfs.ext2'

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Arnout Vandecappelle <arnout@mind.be>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

fs/ext2/ext2.mk

@@ -26,4 +26,11 @@ define ROOTFS_EXT2_CMD
 	PATH=$(TARGET_PATH) $(EXT2_ENV) fs/ext2/genext2fs.sh -d $(TARGET_DIR) $(EXT2_OPTS) $@
 endef
 
+define ROOTFS_EXT2_HOOK_SYMLINK
+	ln -sf rootfs.ext2 $(BINARIES_DIR)/rootfs.ext$(BR2_TARGET_ROOTFS_EXT2_GEN)
+endef
+ifneq ($(BR2_TARGET_ROOTFS_EXT2_GEN),2)
+ROOTFS_EXT2_POST_GEN_HOOKS += ROOTFS_EXT2_HOOK_SYMLINK
+endif
+
 $(eval $(call ROOTFS_TARGET,ext2))