i18n: git-stash die + eval_gettext messages

Signed-off-by: NÆvar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

git-stash.sh

@@ -295,7 +295,7 @@ parse_flags_and_rev()
 			:
 		;;
 		*)
-			die "Too many revisions specified: $REV"
+			die "$(eval_gettext "Too many revisions specified: \$REV")"
 		;;
 	esac