finishing touches of bytecode -> bitcode changes. also unbreak Windows

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37950 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Archive/ArchiveReader.cpp b/lib/Archive/ArchiveReader.cpp
index c8ffcd6..529b652 100644
--- a/lib/Archive/ArchiveReader.cpp
+++ b/lib/Archive/ArchiveReader.cpp
@@ -204,7 +204,7 @@
       break;
   }
 
-  // Determine if this is a bytecode file
+  // Determine if this is a bitcode file
   switch (sys::IdentifyFileType(At, 4)) {
     case sys::Bitcode_FileType:
       flags |= ArchiveMember::BitcodeFlag;