Fix Windows glibc bot
Fix Windows glibc bot

CMD.EXE has command line limit: 8192 characters (cygwin's limit is
32768).  We are hitting this limit on buildbots.  Short-term fix is
to shorten path to temporary files: we don't need to bother with
different patch for different targets here because scons takes care
of that.  Long term we should invent something more scalable.
Review URL: http://codereview.chromium.org/6928032

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@5180 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,sbc100/native_client,nacl-webkit/native_client,sbc100/native_client,nacl-webkit/native_client