Add dependencies on make_ext4fs

Change-Id: I6e3a6ba33fd9e0ce35137f6e2f60d01521af4cb9
diff --git a/core/Makefile b/core/Makefile
index 897cc40..f5d23b4 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -571,7 +571,7 @@
 endif
 
 ifeq ($(INTERNAL_USERIMAGES_USE_EXT),true)
-INTERNAL_USERIMAGES_DEPS := $(MKEXT2USERIMG) $(MKEXT2IMG) $(TUNE2FS) $(E2FSCK)
+INTERNAL_USERIMAGES_DEPS := $(MKEXT2USERIMG) $(MAKE_EXT4FS)
 INTERNAL_USERIMAGES_BINARY_PATHS := $(sort $(dir $(INTERNAL_USERIMAGES_DEPS)))
 
 # $(1): src directory