Fix some Clang-tidy modernize-deprecated-headers and Include What You Use warnings; other minor fixes.

Differential revision: http://reviews.llvm.org/D20042

llvm-svn: 268989
diff --git a/llvm/lib/DebugInfo/PDB/Raw/ByteStream.cpp b/llvm/lib/DebugInfo/PDB/Raw/ByteStream.cpp
index 8dc3c85..09b51d9 100644
--- a/llvm/lib/DebugInfo/PDB/Raw/ByteStream.cpp
+++ b/llvm/lib/DebugInfo/PDB/Raw/ByteStream.cpp
@@ -8,7 +8,9 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/DebugInfo/PDB/Raw/ByteStream.h"
+#include "llvm/DebugInfo/PDB/Raw/RawError.h"
 #include "llvm/DebugInfo/PDB/Raw/StreamReader.h"
+#include <cstring>
 
 using namespace llvm;
 using namespace llvm::pdb;