Do not dump the --config argument.

When generating a config file from a commandline, cargo2android.py
should not dump the --config argument, as the point of the dump is to
generate a config file to use.  This would not normally matter, but it
could help in scripts.

Test: Run and do not see --config in the dumped file.
Change-Id: Idc2911ba674e67272c9cf836c89607e10ca0dddd
1 file changed