Fixed bug 4684 - GLES1 variables missing under Android with CMake

Braden Obrzut

https://hg.libsdl.org/SDL/file/7dc39b047055/CMakeLists.txt#l911

I believe the following should also be specified there:

set(SDL_VIDEO_OPENGL_ES 1)
set(SDL_VIDEO_RENDER_OGL_ES 1)

As it is now GLES1 support is missing when building for Android despite it linking to the library.

CMakeLists.txt

@@ -909,6 +909,8 @@ if(ANDROID)
     if(VIDEO_OPENGLES)
       set(SDL_VIDEO_OPENGL_EGL 1)
       set(HAVE_VIDEO_OPENGLES TRUE)
+      set(SDL_VIDEO_OPENGL_ES 1)
+      set(SDL_VIDEO_RENDER_OGL_ES 1)
       set(SDL_VIDEO_OPENGL_ES2 1)
       set(SDL_VIDEO_RENDER_OGL_ES2 1)