[TSAN] Fix build bot failure for powerpc64le

race_on_mutex.c passes for powerpc64le too after revision 263778. So removing the XFAIL marker.

llvm-svn: 263779

compiler-rt/test/tsan/race_on_mutex.c

@@ -1,7 +1,4 @@
 // RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
-// This test fails when run on powerpc64 (VMA=46).
-// The size of the write reported by Tsan for T1 is 8 instead of 1.
-// XFAIL: powerpc64
 #include "test.h"
 
 pthread_mutex_t Mtx;