perl/Makefile: install Git::I18N under NO_PERL_MAKEMAKER
perl/Makefile: install Git::I18N under NO_PERL_MAKEMAKER

When I added the i18n infrastructure in v1.7.8-rc2-1-g5e9637c I forgot
to install Git::I18N also when NO_PERL_MAKEMAKER=YesPlease was
set. Change the generation of the fallback perl.mak file to do that.

Now Git/I18N.pm is installed alongside Git.pm in such a way that
anything that uses GITPERLLIB will find it.

Reported-by: Tom G. Christensen <1c1659c8b732dbc7a2ecc185c98f9f178154b466@statsbiblioteket.dk>
Signed-off-by: Ævar Arnfjörð Bjarmason <0135fcc047f75af264c800977a73e353c6ba842d@gmail.com>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git