repo init: Require Git version 1.9 at least
repo init: Require Git version 1.9 at least

The reparator we need was added in version 1.8.5.4, so let's just require 1.9.0
to save some parsing and some extra code.

Change-Id: 37df95cde7

salsaflow/salsaflow,salsaflow/salsaflow