Correctly produce R_X86_64_32 or R_X86_64_32S.

With this patch in

movq    $foo, foo(%rip)
foo:
.long   foo

We produce a R_X86_64_32S for the first relocation and R_X86_64_32 for the
second one.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115134 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86AsmBackend.cpp b/lib/Target/X86/X86AsmBackend.cpp
index 231f151..d9c6daa 100644
--- a/lib/Target/X86/X86AsmBackend.cpp
+++ b/lib/Target/X86/X86AsmBackend.cpp
@@ -36,6 +36,7 @@
   case X86::reloc_pcrel_4byte:
   case X86::reloc_riprel_4byte:
   case X86::reloc_riprel_4byte_movq_load:
+  case X86::reloc_signed_4byte:
   case FK_Data_4: return 2;
   case FK_Data_8: return 3;
   }