gamemode: fix build with glibc 2.36

srcpkgs/gamemode/patches/glibc-2.36.patch

@@ -0,0 +1,23 @@
+From 19832cf103ac4af70711ead9cc00fd23e073bb78 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Nyikos=20Zolt=C3=A1n?= <nyikoszoltan0@gmail.com>
+Date: Wed, 10 Aug 2022 19:56:59 +0200
+Subject: [PATCH] Fix building when pidfd_open is available
+
+On glibc2.36 pidfd_open was made available, but it needs an include
+---
+ common/common-pidfds.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/common/common-pidfds.c b/common/common-pidfds.c
+index 00929f70..61442e34 100644
+--- a/common/common-pidfds.c
++++ b/common/common-pidfds.c
+@@ -58,6 +58,8 @@ static int pidfd_open(pid_t pid, unsigned int flags)
+ {
+ 	return (int)syscall(__NR_pidfd_open, pid, flags);
+ }
++#else
++#include <sys/pidfd.h>
+ #endif
+ 
+ /* pidfd functions */