Merge pull request #1045 from cxd4/glitch64-includes

[Glitch64] Fix pre-processor errors for non-Android builds besides #ifdef _WIN32.

Source/Glitch64/OGLglitchmain.cpp

@@ -17,7 +17,7 @@
 #include "g3ext.h"
 #include "glitchmain.h"
 #include <Glide64/trace.h>
-#include <Common\Util.h>
+#include <Common/Util.h>
 
 #ifdef VPDEBUG
 #include <IL/il.h>

Source/Glitch64/opengl.h

@@ -5,14 +5,13 @@ extern "C"
 {
 #endif
 
-#ifdef _WIN32
-#include <GL/gl.h>              /* Header File For The OpenGL Library */
-#else
+#if defined(ANDROID) || defined(__ANDROID__)
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
 
 typedef unsigned int     GLenum;
-
+#else
+#include <GL/gl.h>              /* Header File For The OpenGL Library */
 #endif
 
 #ifndef APIENTRY