add rules to png

Author: zilongshanren

contrib/src/png/rules.mak

@@ -16,6 +16,9 @@ $(TARBALLS)/libpng-$(PNG_VERSION).tar.xz:
 
 png: libpng-$(PNG_VERSION).tar.xz .sum-png
 	$(UNPACK)
+	$(APPLY) $(SRC)/png/winrt.patch
+	$(APPLY) $(SRC)/png/bins.patch
+	$(APPLY) $(SRC)/png/automake.patch
 	$(MOVE)
 
 DEPS_png = zlib $(DEPS_zlib)