cpuid: try to fix build on builders using older beta5. (#12933)

sys-apps/cpuid/patches/cpuid-1.8.3.patchset

@@ -1,4 +1,4 @@
-From 9c8cad858d712e36468c8925eb3fd5ceb5d7d337 Mon Sep 17 00:00:00 2001
+From 6224b7667657c85e8cfa063fa01560979b33a680 Mon Sep 17 00:00:00 2001
 From: Oscar Lesta <oscar.lesta@gmail.com>
 Date: Thu, 11 Sep 2025 12:27:29 -0300
 Subject: Initial Haiku support.
@@ -74,3 +74,27 @@ index a42016a..f096b34 100644
 -- 
 2.50.1
 
+
+From 4280df389f88c70244be76fbeecc88685804eab0 Mon Sep 17 00:00:00 2001
+From: Oscar Lesta <oscar.lesta@gmail.com>
+Date: Sun, 14 Sep 2025 19:28:00 -0300
+Subject: Try to fix the build on builders using older beta5.
+
+
+diff --git a/threads.c b/threads.c
+index f096b34..7386615 100644
+--- a/threads.c
++++ b/threads.c
+@@ -51,6 +51,9 @@
+ 
+ #elif defined(TARGET_OS_HAIKU)
+ 
++// only needed on current builder bots, still running hrev57937_111
++#define _GNU_SOURCE
++
+ #include <pthread.h>
+ #include <sched.h>
+ 
+-- 
+2.50.1
+