Don't build OpenGL modules on unsupported platforms.

glsdlgraphics.mod/glsdlgraphics.bmx

@@ -10,6 +10,8 @@ ModuleInfo "Copyright: Blitz Research Ltd"
 ModuleInfo "History: 1.00"
 ModuleInfo "History: Port to SDL backend, based on snippets from BRL.GLGraphics."
 
+?Not opengles
+
 Import SDL.SDLGraphics
 Import BRL.Pixmap
 Import Pub.Glew
@@ -191,4 +193,4 @@ Function GLDrawText( text$,x,y )
 	EndOrtho
 End Function
 
-
+?

glsdlmax2d.mod/glsdlmax2d.bmx

@@ -35,6 +35,8 @@ ModuleInfo "History: Ripped out a bunch of dead code"
 ModuleInfo "History: 1.05 Release"
 ModuleInfo "History: Added checks to prevent invalid textures deletes"
 
+?Not opengles
+
 Import BRL.Max2D
 Import SDL.GLSDLGraphics
 
@@ -537,3 +539,5 @@ End Function
 
 Local driver:TGLMax2DDriver=GLMax2DDriver()
 If driver SetGraphicsDriver driver
+
+?

sdl.mod/sdl.bmx

@@ -69,7 +69,7 @@ Import "SDL/include/*.h"
 ?
 
 ?Not android
-'Import "include/*.h"
+Import "include/*.h"
 ?
 
 ?win32