Fix x64 Windows builds break. (#917)

* Add /bigobj flag to fix x64 Windows compile error for rewriter tool.

* Add additional file with compile time error.

* Add missing include.

Author: dtarditi

clang/lib/CConv/ArrayBoundsInferenceConsumer.cpp

@@ -15,6 +15,7 @@
 #include "clang/CConv/ArrayBoundsInferenceConsumer.h"
 #include "clang/CConv/ConstraintResolver.h"
 #include <sstream>
+#include <cctype>
 
 static std::set<std::string> LengthVarNamesPrefixes = {"len", "count",
                                                                "size", "num",

clang/lib/CConv/CMakeLists.txt

@@ -3,6 +3,12 @@ set( LLVM_LINK_COMPONENTS
         Option
         Support
         )
+
+if (MSVC)
+  set_source_files_properties(RewriteUtils.cpp PROPERTIES COMPILE_FLAGS /bigobj)
+  set_source_files_properties(ArrayBoundsInferenceConsumer.cpp PROPERTIES COMPILE_FLAGS /bigobj)
+endif()
+
         add_clang_library(CConv
           ABounds.cpp
           AVarBoundsInfo.cpp