improve compatibility

Change-Id: Id062746a79f20bce45f6d9176a74d7cb3979430a
diff --git a/Android.mk b/Android.mk
index 4581c89..8db5eb2 100644
--- a/Android.mk
+++ b/Android.mk
@@ -17,6 +17,7 @@
 	src/base/ftbbox.c \
 	src/base/ftbitmap.c \
 	src/base/ftglyph.c \
+	src/base/ftlcdfil.c \
 	src/base/ftstroke.c \
 	src/base/ftxf86.c \
 	src/base/ftbase.c \