When running an svn update, if --force was passed on the...

When running an svn update, if --force was passed on the
command line to gclient, pass the flag to svn update and
svn co too.

This allows updates when we have dirty files left around.
For example, an update may remove a directory, but the
directory still has .vcproj or .mk files in it.  If we
try to re-add that directory, svn will error out.  If
we add --force, it'll happily allow the update.

Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=48897

[tony, 2010-06-03 03:46:01]

This is to fix a problem we're seeing on the webkit.org bots where we can't
update without manually cleaning out base/third_party/dynamic_annotations
because it still exists with a .mk or .vcproj file.

[M-A Ruel, 2010-06-03 13:24:03]

lgtm