i18n: git-submodule "path not initialized" message

Gettextize the "Submodule path '$path' not initialized" message. This
is explicitly tested for so we need to skip a portion of a test with
test_i18grep.

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

git-submodule.sh

@@ -464,8 +464,8 @@ cmd_update()
 			# Only mention uninitialized submodules when its
 			# path have been specified
 			test "$#" != "0" &&
-			say "Submodule path '$path' not initialized" &&
-			say "Maybe you want to use 'update --init'?"
+			say "$(eval_gettext "Submodule path '\$path' not initialized
+Maybe you want to use 'update --init'?")"
 			continue
 		fi
 

t/t7400-submodule-basic.sh

@@ -357,7 +357,7 @@ test_expect_success 'update --init' '
 
 	git submodule update init > update.out &&
 	cat update.out &&
-	grep "not initialized" update.out &&
+	test_i18ngrep "not initialized" update.out &&
 	! test -d init/.git &&
 
 	git submodule update --init init &&