t5604: GETTEXT_POISON fix, conclusion

In fade728df1 (apply: fix writing behind newly created symbolic links,
2023-02-02), we backported a patch onto v2.30.* that was originally
based on a much newer version. The v2.30.* release train still has the
GETTEXT_POISON CI job, though, and hence needs `test_i18n*` in its
tests.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

t/t4115-apply-symlink.sh

@@ -72,7 +72,7 @@ test_expect_success SYMLINKS 'symlink escape when creating new files' '
 	cat >expected_stderr <<-EOF &&
 	error: affected file ${SQ}renamed-symlink/create-me${SQ} is beyond a symbolic link
 	EOF
-	test_cmp expected_stderr stderr &&
+	test_i18ncmp expected_stderr stderr &&
 	! test_path_exists .git/create-me
 '