update_engine: Convert arguments to base::CommandLine compatible format

base::CommandLine doesn't handle space-delimited flag-value pairs.  Any
non-bool flag must use an '=' as the delimiter.

BUG=chromium:402636
TEST=`cbuildbot --remote --hwtest falco-paladin`

Change-Id: I218f6eab28b0160e8379a2716f5c33edeaf9841d
Reviewed-on: https://chromium-review.googlesource.com/223329
Reviewed-by: Alex Deymo <deymo@chromium.org>
Commit-Queue: Steve Fung <stevefung@chromium.org>
Tested-by: Steve Fung <stevefung@chromium.org>
1 file changed