Implement ELF::R_X86_64_GOTPCREL.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115547 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/ELFObjectWriter.cpp b/lib/MC/ELFObjectWriter.cpp
index d650259..6a2a6e5 100644
--- a/lib/MC/ELFObjectWriter.cpp
+++ b/lib/MC/ELFObjectWriter.cpp
@@ -588,6 +588,9 @@
       case MCSymbolRefExpr::VK_PLT:
         Type = ELF::R_X86_64_PLT32;
         break;
+      case llvm::MCSymbolRefExpr::VK_GOTPCREL:
+        Type = ELF::R_X86_64_GOTPCREL;
+        break;
       default:
         llvm_unreachable("Unimplemented");
       }