Update libpng from 1.6.3 to 1.6.10

Change-Id: I76e81e7fd267d15991cd342c5caeb2fe77964ebf
diff --git a/Android.mk b/Android.mk
index b05ad63..2551612 100644
--- a/Android.mk
+++ b/Android.mk
@@ -30,8 +30,9 @@
 my_cflags_arm += -fno-slp-vectorize
 
 my_src_files_arm := \
-    arm/arm_init.c \
-    arm/filter_neon.S
+			arm/arm_init.c \
+			arm/filter_neon.S \
+			arm/filter_neon_intrinsics.c
 
 
 common_CFLAGS := -std=gnu89 #-fvisibility=hidden ## -fomit-frame-pointer