t5324: reorder `run_with_limited_open_files test_might_fail`

In the future, we plan on only allowing `test_might_fail` to work on a
restricted subset of commands, including `git`. Reorder the commands so
that `run_with_limited_open_files` comes before `test_might_fail`. This
way, `test_might_fail` operates on a git command.

Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t5324-split-commit-graph.sh

@@ -399,7 +399,7 @@ test_expect_success ULIMIT_FILE_DESCRIPTORS 'handles file descriptor exhaustion'
 		for i in $(test_seq 64)
 		do
 			test_commit $i &&
-			test_might_fail run_with_limited_open_files git commit-graph write \
+			run_with_limited_open_files test_might_fail git commit-graph write \
 				--split=no-merge --reachable || return 1
 		done
 	)