tests: Fix tc_client_fd_leaks_exec test
tc_client_fd_leaks and tc_client_fd_leaks_exec are currently the exact same test. It seems clear from the name that the latter was intended to spawn sanity_fd_leak_exec instead of sanity_fd_leak.
Fixes #121 (closed)
Signed-off-by: Derek Foreman derek.foreman@collabora.com