This is a fix for the test whether a patch is bot generated or not, as
that did not worked as intended. The problem is that the script is
checking the email address of the parent patch (HEAD~), which probably
should be right in case the patch would be a MERGE patch. But this is
wrong in case the patch is not a MERGE patch. This fix uses the very
same pattern as it is using for the commit message parsing: the
$commit_hash variable, which is the parent's commit hash if the patch
is a MERGE patch, and an empty string in the other case (causing to
call 'git show' on HEAD).
Change-Id: I0abc72180edf34a6dd0624a40fb8682397805eca
Elod Illes
b8f3975d36