Don't treat bitcode files specially in llvm-ar.

We really want bitcode files to behave as regular object files in archives, so
we don't need to track that a member is bitcode.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185681 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-ar/ArchiveWriter.cpp

@@ -183,13 +183,6 @@ bool Archive::addFileBefore(StringRef filePath, iterator where,
   sys::fs::file_magic type;
   if (sys::fs::identify_magic(mbr->path, type))
     type = sys::fs::file_magic::unknown;
-  switch (type) {
-    case sys::fs::file_magic::bitcode:
-      flags |= ArchiveMember::BitcodeFlag;
-      break;
-    default:
-      break;
-  }
   mbr->flags = flags;
   members.insert(where,mbr);
   return false;