glapi: Include glheader.h in glapi_nop.c.

In addition to OpenGL headers, glheader.h also defines OpenGL ES types
that are used in core Mesa or ES overlay.

src/mesa/glapi/glapi_nop.c

@@ -39,6 +39,7 @@
 
 
 #include "main/compiler.h"
+#include "main/glheader.h"
 #include "glapi/glapi.h"
 
 
@@ -87,11 +88,4 @@ NoOpUnused(void)
 #define UNUSED_TABLE_NAME __unused_noop_functions
 
 
-/*
- * Types needed when generating ES 1 functions.
- */
-typedef int GLfixed;
-typedef int GLclampx;
-
-
 #include "glapi/glapitemp.h"