util/u_process: protect entrypoints for c++

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Rohan Garg <rohan.garg@intel.com>
Acked-by: Antonio Caggiano <antonio.caggiano@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13996>

src/util/u_process.h

@@ -30,10 +30,18 @@
 
 #include <stddef.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 const char *
 util_get_process_name(void);
 
 size_t
 util_get_process_exec_path(char* process_path, size_t len);
 
+#ifdef __cplusplus
+} /* extern C */
+#endif
+
 #endif