Disable NEON optimizations for libpng17 as a try to fix android texture replacement.

CMakeLists.txt

@@ -272,6 +272,7 @@ endforeach()
 if(NOT MSVC)
 	if(ANDROID)
 		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")
+		add_definitions(-DPNG_ARM_NEON_OPT=0)
 	endif()
 	if(CLANG)
 		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-switch -Wno-uninitialized")