Try to allocate executable memory close to PPSSPP memory if not below 4GB
executable memory allocation changes
fix 32-bit builds
typo
Detect and use SDL2 with help of this Dolphin CMake module:
https://github.com/dolphin-emu/dolphin/blob/master/CMakeTests/FindSDL2.cmake
Look for SDL_gamecontroller.h instead of SDL.h to prevent CMake from
using SDL1 include dirs
Update to SDL2
Update native submodule
Merge branch 'master' into sdl2

Conflicts:
	native
Move spline generation to SplineCommon, make SplineDX9.cpp identical to Spline.cpp (merge later somehow)
More convergence (tex stuff)
d3d: Correct framebuffer sizing issues.
d3d: Set texture only when enabled.

This allows optimizations that were applied to the cmd flags.
dx9: More execute functions
Only show the graphics API on the title screen in Windows
Merge pull request #6899 from unknownbrackets/gpu-convergence

d3d: Set texture only when enabled
Merge pull request #6900 from hrydgard/gpu-convergence-2

Gpu convergence 2 - break out much of the Spline code into GPU/Common, fixes some minor things
d3d: Support offset rendering.
d3d: Flip v correctly when buffer swapping.
d3d: Flip viewport y within the top of the fb.

Fixes issues when the framebuffer is larger than the current render
target.