Misc documentation/comment fixes.

llvm-svn: 228093

llvm/lib/Bitcode/Reader/BitcodeReader.cpp

@@ -2196,7 +2196,8 @@ std::error_code BitcodeReader::ParseModule(bool Resume) {
     }
     // GLOBALVAR: [pointer type, isconst, initid,
     //             linkage, alignment, section, visibility, threadlocal,
-    //             unnamed_addr, dllstorageclass]
+    //             unnamed_addr, externally_initialized, dllstorageclass,
+    //             comdat]
     case bitc::MODULE_CODE_GLOBALVAR: {
       if (Record.size() < 6)
         return Error("Invalid record");