change some files to pass MSVC 2013


git-svn-id: http://protobuf.googlecode.com/svn@541 630680e5-0e50-0410-840e-4b1c322b438d
add one file for VC 2013


git-svn-id: http://protobuf.googlecode.com/svn@542 630680e5-0e50-0410-840e-4b1c322b438d