mailmap: Yehuda Sadeh name normalization

Reported-by: Loic Dachary <loic@dachary.org>
Signed-off-by: Abhishek Lekshmanan <abhishek.lekshmanan@gmail.com>
Merge pull request #2627 from theanalyst/fix/mailmap

mailmap: Yehuda Sadeh name normalization

Reviewed-by: Loic Dachary <loic-201408@dachary.org>