upgrade freetype to 2.4.2.

Bug: 2969145

Change-Id: I8debbbe0bd478d9cf8c39cff5179981b5f3b371a
diff --git a/Android.mk b/Android.mk
index 12c0b6a..4581c89 100644
--- a/Android.mk
+++ b/Android.mk
@@ -1,10 +1,10 @@
 # this is now the default FreeType build for Android
 #
 ifndef USE_FREETYPE
-USE_FREETYPE := 2.3.12
+USE_FREETYPE := 2.4.2
 endif
 
-ifeq ($(USE_FREETYPE),2.3.12)
+ifeq ($(USE_FREETYPE),2.4.2)
 LOCAL_PATH:= $(call my-dir)
 include $(CLEAR_VARS)