mesa/glsl: rename preprocess to glcpp_preprocess

This symbol with dricore escapes into the namespace, its too generic,
we should prefix it with something just to be nice.

Should be applied to stable + 9.0

Acked-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

src/glsl/glcpp/glcpp.c

@@ -111,7 +111,7 @@ main (int argc, char *argv[])
 	if (shader == NULL)
 	   return 1;
 
-	ret = preprocess(ctx, &shader, &info_log, NULL, API_OPENGL);
+	ret = glcpp_preprocess(ctx, &shader, &info_log, NULL, API_OPENGL);
 
 	printf("%s", shader);
 	fprintf(stderr, "%s", info_log);

src/glsl/glcpp/glcpp.h

@@ -196,7 +196,7 @@ void
 glcpp_parser_destroy (glcpp_parser_t *parser);
 
 int
-preprocess(void *ralloc_ctx, const char **shader, char **info_log,
+glcpp_preprocess(void *ralloc_ctx, const char **shader, char **info_log,
 	   const struct gl_extensions *extensions, int api);
 
 /* Functions for writing to the info log */

src/glsl/glcpp/pp.c

@@ -150,7 +150,7 @@ remove_line_continuations(glcpp_parser_t *ctx, const char *shader)
 }
 
 int
-preprocess(void *ralloc_ctx, const char **shader, char **info_log,
+glcpp_preprocess(void *ralloc_ctx, const char **shader, char **info_log,
 	   const struct gl_extensions *extensions, int api)
 {
 	int errors;