Rename SharpZipLib to work for xbuild /t:localize

Building localizations on Linux/Mono fails because the old versions of
ICSharpLib.SharpZipLib stored in the gac do not work for the Zip task
used in building localizations.  (The search algorithm for Mono tries
the directory of the program, then the gac, and then the directory of
the calling assembly.)  Renaming our newer version of the DLL in the
Build directory to include the version number fixes this problem.

Change-Id: I6e2596b4da931d60d8d743cd863078f39bfdd398