[COFF] Add missing Requires x86 to fix buildbot

Add REQUIRES: x86 to pdb-debug-f.s as this is causing the Arm and
AArch64 buildbots to fail as they do not have the x86 backend.

Differential Revision: https://reviews.llvm.org/D52606



git-svn-id: https://llvm.org/svn/llvm-project/lld/trunk@343196 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/COFF/pdb-debug-f.s b/test/COFF/pdb-debug-f.s
index ffd9e3e..624c119 100644
--- a/test/COFF/pdb-debug-f.s
+++ b/test/COFF/pdb-debug-f.s
@@ -1,3 +1,4 @@
+# REQUIRES: x86
 # RUN: llvm-mc -triple=i386-pc-win32 -filetype=obj -o %t.obj %s
 # RUN: lld-link /subsystem:console /debug /nodefaultlib /entry:foo /out:%t.exe /pdb:%t.pdb %t.obj
 # RUN: llvm-pdbutil dump -fpo %t.pdb | FileCheck %s