Add courgette64.exe for staging win64

This is required for some internal update generation.

R=grt@chromium.org

Review URL: https://codereview.chromium.org/271823007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@269517 0039d316-1c4b-4281-b951-d872f2087c98

chrome/tools/build/win/FILES.cfg

@@ -641,7 +641,6 @@ FILES = [
   },
   {
     'filename': 'courgette64.exe',
-    'arch': ['32bit'],
     'buildtype': ['official'],
     'archive': 'courgette64.exe',
   },