support make_f2fs with casefolding

Bug: 159672232
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
Change-Id: I4ac22a989010c747502d97e76faabf6cfdd9bf04
diff --git a/core/Makefile b/core/Makefile
index 2550c0e..eba764d 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -3828,6 +3828,7 @@
   lpunpack \
   lz4 \
   make_f2fs \
+  make_f2fs_casefold \
   merge_target_files \
   minigzip \
   mk_combined_img \