Add <stdlib.h> to ext/vjson/block_allocator.cpp, required on some platforms
Add <stdlib.h> to ext/vjson/block_allocator.cpp, required on some platforms

zhykzhykzhyk/ppsspp-native,Ced2911/native,unknownbrackets/native,unknownbrackets/native,unknownbrackets/native,zhykzhykzhyk/ppsspp-native,hrydgard/native,Ced2911/native,unknownbrackets/native,libretro/ppsspp-native,libretro/ppsspp-native,zhykzhykzhyk/ppsspp-native,hrydgard/native,zhykzhykzhyk/ppsspp-native,hrydgard/native,libretro/ppsspp-native,Ced2911/native,libretro/ppsspp-native,hrydgard/native