compiler: fix glsl_types.h compile failures when including as C++ in drivers

Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7807>

src/compiler/glsl_types.h

@@ -36,7 +36,7 @@
 #include "util/macros.h"
 
 #ifdef __cplusplus
-#include "main/config.h"
+#include "mesa/main/config.h"
 #endif
 
 struct glsl_type;
@@ -288,7 +288,7 @@ enum {
 
 #include "GL/gl.h"
 #include "util/ralloc.h"
-#include "main/menums.h" /* for gl_texture_index, C++'s enum rules are broken */
+#include "mesa/main/menums.h" /* for gl_texture_index, C++'s enum rules are broken */
 
 struct glsl_type {
    GLenum gl_type;