put back image libs

Author: kermitt2

libs/image/png/linux/32/libpng.a

@@ -0,0 +1,33 @@
+cmake_minimum_required(VERSION 3.5+)
+project(png)
+
+set(CMAKE_CXX_STANDARD 98)
+
+get_filename_component(PARENT_DIR ../.. ABSOLUTE)
+set ( ZLIB_SUBDIR ${PARENT_DIR}/zlib/src)
+
+set(PNG_SOURCE_FILES
+        png.c
+        png.h
+        pngconf.h
+        pngerror.c
+        pnggccrd.c
+        pngget.c
+        pngmem.c
+        pngpread.c
+        pngread.c
+        pngrio.c
+        pngrtran.c
+        pngrutil.c
+        pngset.c
+        pngtrans.c
+        pngvcrd.c
+        pngwio.c
+        pngwrite.c
+        pngwtran.c
+        pngwutil.c
+        )
+include_directories("${ZLIB_SUBDIR}")
+
+add_library(${PROJECT_NAME} STATIC ${PNG_SOURCE_FILES})
+target_link_libraries(png zlib ${ZLIB_SUBDIR}/libzlib.a)