Merge pull request #5984 from jbeich/gcc-freebsd

common,video-core: unbreak GCC 11 build on FreeBSD 13

src/common/cityhash.h

@@ -61,6 +61,7 @@
 
 #pragma once
 
+#include <cstddef>
 #include "common/common_types.h"
 
 namespace Common {

src/video_core/shader_notify.cpp

@@ -2,6 +2,7 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <mutex>
 #include "video_core/shader_notify.h"
 
 using namespace std::chrono_literals;