dispatch: Include glheader.h in dispatch-related files.

This ensures that GLES1-only typedefs are available in these files.
In a future patch, this will allow us to expand the dispatch table to
include GLES1-only functions.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Chad Versace <chad.versace@linux.intel.com>

src/glx/tests/indirect_api.cpp

@@ -44,7 +44,7 @@
  */
 
 #include <gtest/gtest.h>
-#include <GL/gl.h>
+#include "main/glheader.h"
 extern "C" {
 #include "../indirect_init.h"
 #include "glapi/glapi.h"

src/mapi/glapi/gen/gl_gentable.py

@@ -54,7 +54,7 @@ header = """/* GLXEXT is the define used in the xserver when the GLX extension i
 #include <stdlib.h>
 #include <stdio.h>
 
-#include <GL/gl.h>
+#include "main/glheader.h"
 
 #include "glapi.h"
 #include "glapitable.h"

src/mapi/glapi/tests/check_table.cpp

@@ -22,7 +22,7 @@
  */
 
 #include <gtest/gtest.h>
-#include <GL/gl.h>
+#include "../mesa/main/glheader.h"
 
 extern "C" {
 #include "glapi/glapi.h"

src/mapi/shared-glapi/tests/check_table.cpp

@@ -22,7 +22,7 @@
  */
 
 #include <gtest/gtest.h>
-#include <GL/gl.h>
+#include "../../../mesa/main/glheader.h"
 
 extern "C" {
 #include "glapi/glapi.h"