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The options used to code sign parts are integral to their function, and
so they do not belong as options of the config. Instead, they should be
associated with the CodeSignedProduct part that is being signed.

This also removes the `-o library` option to the Helper application,
which was accidentally added during the transition to the new scripts.
The Helper is not yet ready for library validation, since it currently
loads Flash which is signed by a different Team ID.

Bug: 964673, 958163
Change-Id: Iefc8dfb56decc94f6618d4d27fd4c0daae9a059b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1618274Reviewed-by: Mark Mentovai <mark@chromium.org>
Commit-Queue: Robert Sesek <rsesek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#661229}