this is (unfortunately) several changes mixed together:

1. Spell SectionFlags::Writeable as "Writable".
2. Add predicates for deriving SectionFlags from SectionKinds.
3. Sink ELF-specific getSectionPrefixForUniqueGlobal impl into
   ELFTargetAsmInfo.
4. Fix SectionFlagsForGlobal to know that BSS/ThreadBSS has the
   BSS bit set (the real fix for PR4619).
5. Fix isSuitableForBSS to not put globals with explicit sections
   set in BSS (which was the reason #4 wasn't fixed earlier).
6. Remove my previous hack for PR4619.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77085 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/ELFWriter.cpp b/lib/CodeGen/ELFWriter.cpp
index 8cbaf6f..45658e0 100644
--- a/lib/CodeGen/ELFWriter.cpp
+++ b/lib/CodeGen/ELFWriter.cpp
@@ -222,7 +222,7 @@
 
   if (Flags & SectionFlags::Code)
     ElfSectionFlags |= ELFSection::SHF_EXECINSTR;
-  if (Flags & SectionFlags::Writeable)
+  if (Flags & SectionFlags::Writable)
     ElfSectionFlags |= ELFSection::SHF_WRITE;
   if (Flags & SectionFlags::Mergeable)
     ElfSectionFlags |= ELFSection::SHF_MERGE;