Makefile: don't invoke msgfmt with --statistics

Remove the --statistics flag that I added in 5e9637c6297 (i18n: add infrastructure for translating Git with gettext, 2011-11-18). Our Makefile output is good about reducing verbosity by default, except in this case: $ rm -rf po/build/locale/e*; time make -j $(nproc) all SUBDIR templates MKDIR -p po/build/locale/el/LC_MESSAGES MSGFMT po/build/locale/el/LC_MESSAGES/git.mo MKDIR -p po/build/locale/es/LC_MESSAGES MSGFMT po/build/locale/es/LC_MESSAGES/git.mo 1038 translated messages, 3325 untranslated messages. 5230 translated messages. I didn't have any good reason for using --statistics at the time other than ad-hoc eyeballing of the output. We don't need to spew out exactly how many messages we've got translated every time. Now we'll instead emit: $ rm -rf po/build/locale/e*; time make -j $(nproc) all SUBDIR templates MKDIR -p po/build/locale/el/LC_MESSAGES MSGFMT po/build/locale/el/LC_MESSAGES/git.mo MKDIR -p po/build/locale/es/LC_MESSAGES MSGFMT po/build/locale/es/LC_MESSAGES/git.mo Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>