Allow creation of SHT_NULL sections, from Roman Divacky.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@112605 91177308-0d34-0410-b5e6-96231b3b80d8

lib/MC/ELFObjectWriter.cpp

@@ -919,6 +919,7 @@ void ELFObjectWriterImpl::WriteObject(const MCAssembler &Asm,
     case ELF::SHT_PROGBITS:
     case ELF::SHT_STRTAB:
     case ELF::SHT_NOBITS:
+    case ELF::SHT_NULL:
       // Nothing to do.
       break;