Updating to latest release of raylib

[damntourists]

This PR adds all of the latest updates from https://github.com/raysan5/raylib which I've also confirmed as a fix for #521.

[damntourists]

I added a sdl_shim.h which enables compiling with sdl2. Previously was failing with

In file included from rcore.c:545:
platforms/rcore_desktop_sdl.c: In function ‘PollInputEvents’:
platforms/rcore_desktop_sdl.c:1753:31: error: ‘SDL_Event’ has no member named ‘gbutton’; did you mean ‘button’?
 1753 |                 switch (event.gbutton.button)
      |                               ^~~~~~~
      |                               button
platforms/rcore_desktop_sdl.c:1781:60: error: ‘SDL_Event’ has no member named ‘gbutton’; did you mean ‘button’?
 1781 |                         if (platform.gamepadId[i] == event.gbutton.which)
      |                                                            ^~~~~~~
      |                                                            button
platforms/rcore_desktop_sdl.c:1794:31: error: ‘SDL_Event’ has no member named ‘gbutton’; did you mean ‘button’?
 1794 |                 switch (event.gbutton.button)
      |                               ^~~~~~~
      |                               button
platforms/rcore_desktop_sdl.c:1822:60: error: ‘SDL_Event’ has no member named ‘gbutton’; did you mean ‘button’?
 1822 |                         if (platform.gamepadId[i] == event.gbutton.which)
      |                                                            ^~~~~~~
      |                                                            button
platforms/rcore_desktop_sdl.c: In function ‘InitPlatform’:
platforms/rcore_desktop_sdl.c:2058:33: warning: initialization of ‘SDL_JoystickID *’ {aka ‘int *’} from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
 2058 |     SDL_JoystickID *joysticks = SDL_GetJoysticks(&numJoysticks); // array of joystick IDs, they do not start from 0
      |                                 ^~~~~~~~~~~~~~~~
      ```

[gen2brain]

It has always been able to compile for SDL2 and, recently, for SDL3. But rcore_desktop_sdl.c changed, that happens on every update, everything changes. See the history, etc. Does raylib use that shim.h? If not, then the issue is elsewhere, and we should not hack it or add unnecessary files.

[damntourists]

It seems the issue was possibly introduced upstream in https://github.com/raysan5/raylib/pull/5176/files since this is using SDL3 specific code. In order to get SDL2 to work with it, the shim was created.

[damntourists]

I've created raysan5/raylib#5403 for some guidance.

[damntourists]

@gen2brain, I've made some updates to this PR. The issue that I was attempting to fix with the shim has been corrected upstream in raylib which I've updated in raylib-go. All jobs in the package's workflow passed in my latest commit @ https://github.com/damntourists/raylib-go/actions/runs/20114236373. Could you take a look and let me know if there's anything I've missed?

[gen2brain]

Nice. Please check #472; a few things must always be changed manually. Also, I think I saw in some raylib commits that something changed for the Android main entry point, but I'm not sure; I do not have time to check now.

[damntourists]

Okay, I've gone through and added the ALIGN def/undef block to jar_mx.h, the !noaudio build tag to raudio.c and updated the entry point for rcore_android.c. Whenever you get a moment, could you check on your end if there's anything I've missed? The unittests are still passing on my fork.

[gen2brain]

Nice, thanks for working on this. I am merging it; it looks good. It is always good to do this, and it is much easier later on a new release. Users still get the latest tagged release; they do not have to use main/master.