Allow SSH agent errors to surface.

This will allow users to know when their sessions dies because of
a non-functioning agent / stale environment variables.

TEST=Script emits an error message to stderr when ssh-add fails.

Change-Id: Ia1c7a642eb75a256e69730c6095ace09284558a2
Reviewed-by: Chris Sosa <>
Commit-Ready: Gilad Arnold <>
Tested-by: Gilad Arnold <>
1 file changed