Android: fix compilation libpng-1.6.37 (missing arm/palette_neon_intrinsics.c)

undefined reference to `png_riffle_palette_neon'
undefined reference to `png_do_expand_palette_rgba8_neon'
undefined reference to `png_do_expand_palette_rgb8_neon'

Author: 1bsyl

external/libpng-1.6.37.patch

@@ -13,15 +13,15 @@ diff -ruN libpng-1.6.37.orig/Android.mk libpng-1.6.37/Android.mk
 +
 +ifeq ($(TARGET_ARCH_ABI),armeabi)
 +common_SRC_FILES += \
-+	arm/arm_init.c arm/filter_neon.S arm/filter_neon_intrinsics.c
++	arm/arm_init.c arm/filter_neon.S arm/filter_neon_intrinsics.c arm/palette_neon_intrinsics.c
 +endif
 +ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
 +common_SRC_FILES += \
-+	arm/arm_init.c arm/filter_neon.S arm/filter_neon_intrinsics.c
++	arm/arm_init.c arm/filter_neon.S arm/filter_neon_intrinsics.c arm/palette_neon_intrinsics.c
 +endif
 +ifeq ($(TARGET_ARCH_ABI),arm64-v8a)
 +common_SRC_FILES += \
-+	arm/arm_init.c arm/filter_neon.S arm/filter_neon_intrinsics.c
++	arm/arm_init.c arm/filter_neon.S arm/filter_neon_intrinsics.c arm/palette_neon_intrinsics.c
 +endif
 +
 +common_CFLAGS := ## -fomit-frame-pointer

external/libpng-1.6.37/Android.mk

@@ -9,15 +9,15 @@ common_SRC_FILES := \
 
 ifeq ($(TARGET_ARCH_ABI),armeabi)
 common_SRC_FILES += \
-	arm/arm_init.c arm/filter_neon.S arm/filter_neon_intrinsics.c
+	arm/arm_init.c arm/filter_neon.S arm/filter_neon_intrinsics.c arm/palette_neon_intrinsics.c
 endif
 ifeq ($(TARGET_ARCH_ABI),armeabi-v7a)
 common_SRC_FILES += \
-	arm/arm_init.c arm/filter_neon.S arm/filter_neon_intrinsics.c
+	arm/arm_init.c arm/filter_neon.S arm/filter_neon_intrinsics.c arm/palette_neon_intrinsics.c
 endif
 ifeq ($(TARGET_ARCH_ABI),arm64-v8a)
 common_SRC_FILES += \
-	arm/arm_init.c arm/filter_neon.S arm/filter_neon_intrinsics.c
+	arm/arm_init.c arm/filter_neon.S arm/filter_neon_intrinsics.c arm/palette_neon_intrinsics.c
 endif
 
 common_CFLAGS := ## -fomit-frame-pointer