[tsan] Disable test from D115759 on Darwin

Author: vitalybuka

compiler-rt/test/tsan/force_background_thread.cpp

@@ -2,6 +2,10 @@
 // RUN: %deflake %env_tsan_opts=force_background_thread=0:verbosity=1:memory_limit_mb=1000 %run %t 2>&1 | FileCheck %s --implicit-check-not "memory flush check"
 // RUN: %deflake %env_tsan_opts=force_background_thread=1:verbosity=1:memory_limit_mb=1000 %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK,THREAD
 // RUN: %deflake %env_tsan_opts=force_background_thread=0:verbosity=1:memory_limit_mb=1000 %run %t 1 2>&1 | FileCheck %s --check-prefixes=CHECK,THREAD
+
+// Fails with: objc[99984]: task_restartable_ranges_register failed (result 0x2e: (os/kern) service not supported)
+// UNSUPPORTED: darwin
+
 #include "test.h"
 
 void *Thread(void *a) { return nullptr; }