Fix support for --flagfile argument
Fix support for --flagfile argument

Recent changes broke support for the --flagfile argument. It would attempt
to find the argument and then pull off the filename portion, but it would
only skip one letter, instead of the full argument name. The resulting
error would be:

Change-Id: Ic252b0c778774a7ea3e24a9ed8b182deb5987f65
OSError: [Errno 2] No such file or directory: 'lagfile=../nova.conf'

n0ano/gantt,n0ano/gantt