fs/common.mk: Fix show-build-order

The command "make show-build-order" doesn't show dependencies of rootfs-common target.

This patch adds $(ROOTFS_COMMON_DEPENDENCIES) to PACKAGES variable.

Signed-off-by: Serj Kalichev <serj.kalichev@gmail.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 305e4487e5c18ed89bf2aa106b2068f9dce686fb)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

fs/common.mk

@@ -147,7 +147,7 @@ rootfs-$(1): $$(BINARIES_DIR)/rootfs.$(1)
 
 ifeq ($$(BR2_TARGET_ROOTFS_$(2)),y)
 TARGETS_ROOTFS += rootfs-$(1)
-PACKAGES += $$(filter-out rootfs-%,$$(ROOTFS_$(2)_DEPENDENCIES))
+PACKAGES += $$(filter-out rootfs-%,$$(ROOTFS_$(2)_DEPENDENCIES) $$(ROOTFS_COMMON_DEPENDENCIES))
 endif
 
 # Check for legacy POST_TARGETS rules