Change a i18n-specific grep in t/t6030-bisect-porcelain.sh to use
test_i18ngrep instead. This was introduced in v1.7.7.2~5^2~11 and has
been broken under GETTEXT_POISON=YesPlease since.
Signed-off-by: NÆvar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>