Add support for the same encodings of the personality function that gnu as
supports.

llvm-svn: 122577
diff --git a/llvm/lib/Target/X86/X86AsmBackend.cpp b/llvm/lib/Target/X86/X86AsmBackend.cpp
index 11ac5eb..0a6cd9c 100644
--- a/llvm/lib/Target/X86/X86AsmBackend.cpp
+++ b/llvm/lib/Target/X86/X86AsmBackend.cpp
@@ -41,6 +41,7 @@
   case X86::reloc_signed_4byte:
   case X86::reloc_global_offset_table:
   case FK_Data_4: return 2;
+  case FK_PCRel_8:
   case FK_Data_8: return 3;
   }
 }