Propagate the exit code for Linux packaging.
Propagate the exit code for Linux packaging.

Previously if the packaging step failed, the error code was not propagated and the build would still succeed. This change will make the build fail for such errors.

Review URL: https://codereview.chromium.org/1438343004

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#359637}

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