Handle reloc_signed_4byte in here. Not doing so was a regression from my
previous commit. It is strange that we see it in 32 bits. We already
have a fixme about it.

llvm-svn: 146273
diff --git a/llvm/lib/MC/ELFObjectWriter.cpp b/llvm/lib/MC/ELFObjectWriter.cpp
index 14ca509..40b84ae 100644
--- a/llvm/lib/MC/ELFObjectWriter.cpp
+++ b/llvm/lib/MC/ELFObjectWriter.cpp
@@ -1749,6 +1749,7 @@
         Type = ELF::R_386_GOTPC;
         break;
 
+      case X86::reloc_signed_4byte:
       case FK_PCRel_4:
       case FK_Data_4:
         switch (Modifier) {