SDLPAL/.gitmodules

[submodule "3rd/googletest"]
	path = 3rd/googletest
	url = https://github.com/google/googletest
[submodule "3rd/SDL"]
	path = 3rd/SDL
	url = https://github.com/sdlpal/SDL.git
[submodule "3rd/mingw-std-threads"]
	path = 3rd/mingw-std-threads
	url = https://github.com/sdlpal/mingw-std-threads.git