tree 1bbc4355f5ab82347d35fcf138b37bb208461f37
parent 28a1a3661cf73036e8597669d695be8e2341d091
author Jan Voung <jvoung@chromium.org> 1427836460 -0700
committer Jan Voung <jvoung@chromium.org> 1427836460 -0700

Add argv[0] before parsing commandline flags.

The \0 delimited string array that the browser sends doesn't have
the program name and the IRT only tokenizes that and forwards
it along. We need argv[0] to make the llvm CL parser happy
(used for -help message, etc).

Alternatively, we could have the IRT fill in a program name
so that the argv is a real argv. That will involve less copying since
the argv will be the right size to begin with, but prevents each app
from customizing its argv[0] =/

BUG= https://code.google.com/p/nativeclient/issues/detail?id=4091
TEST= manual for now (construct the sel_universal script to only pass
the "--build-atts" flag and see it exits without being swallowed,
or pass "-Ofoo" and see an error + exit)

R=mtrofin@chromium.org, stichnot@chromium.org

Review URL: https://codereview.chromium.org/1041843003