This is more consistent with the project style. The majority of Git's
source files use dashes in preference to underscores in their file names.
Also adjust contrib/update-unicode as well.
Signed-off-by: Stefan Beller <sbeller@google.com>
As it's used only by a tiny minority of the Git developer population,
this script does not belong into the main Git source directory.
Move it into contrib/ and adjust the paths to account for the new
location.
Signed-off-by: Beat Bolli <dev+git@drbeat.li>
Signed-off-by: Junio C Hamano <gitster@pobox.com>