Add the PCSymbol for Darwin x86 platforms.

llvm-svn: 41284
diff --git a/llvm/lib/Target/X86/X86TargetAsmInfo.cpp b/llvm/lib/Target/X86/X86TargetAsmInfo.cpp
index a00d616..07a1a19 100644
--- a/llvm/lib/Target/X86/X86TargetAsmInfo.cpp
+++ b/llvm/lib/Target/X86/X86TargetAsmInfo.cpp
@@ -71,6 +71,7 @@
     InlineAsmStart = "# InlineAsm Start";
     InlineAsmEnd = "# InlineAsm End";
     SetDirective = "\t.set";
+    PCSymbol = ".";
     UsedDirective = "\t.no_dead_strip\t";
     WeakRefDirective = "\t.weak_reference\t";
     HiddenDirective = "\t.private_extern\t";