一个老项目最近上googleplay被拒，需要更新libpng库
根据这个commit换了libpng，并且加上zlib
https://github.com/cocos2d/cocos2d-x-3rd-party-libs-bin/commit/a2496dd7a375995803ea9a48e8701a26e4c36c78
修改mk文件的时候ndkbuild出现了问题，一直显示找不到zlib库
ld.exe: error: cannot find -lzlib
mk文件如下
LOCAL_LDLIBS :=
-L$(call host-path, (LOCAL_PATH)/../../liblua/obj/local/(TYPE_ARMEABI)) -llua
-L$(call host-path, (LOCAL_PATH)/../../libextension/obj/local/(TYPE_ARMEABI)) -lextension
-L$(call host-path, (LOCAL_PATH)/../../cocos2dx/obj/local/(TYPE_ARMEABI)) -lcocos2d
-L$(call host-path, (LOCAL_PATH)/../../cocosdenshion/obj/local/(TYPE_ARMEABI)) -lcocosdenshion
-L$(call host-path, (THIRD_PATH)/libcurl/libs/(TYPE_ARMEABI)) -lcurl
-L$(call host-path, (THIRD_PATH)/libcurl/libs/(TYPE_ARMEABI)) -lssl
-L$(call host-path, (THIRD_PATH)/libcurl/libs/(TYPE_ARMEABI)) -lcrypto
-L$(call host-path, (THIRD_PATH)/libjpeg/libs/(TYPE_ARMEABI)) -ljpeg
-L$(call host-path, (THIRD_PATH)/libpng/libs/(TYPE_ARMEABI)) -lpng
-L$(call host-path, (THIRD_PATH)/zlib/libs/(TYPE_ARMEABI)) -lzlib
-L$(call host-path, (THIRD_PATH)/libtiff/libs/(TYPE_ARMEABI)) -ltiff
-L$(call host-path, (THIRD_PATH)/libwebp/libs/(TYPE_ARMEABI)) -lwebp
-lGLESv2
-lm
-llog
报错如下
[exec] D:/android-ndk-r9/toolchains/arm-linux-androideabi-4.6/prebuilt/windows-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/bin/ld.exe: error: cannot find -lzlib