.gitignore: add missing test cases
/test/probe
/test/read-write
/test/register-restrictions
+/test/rename
/test/ring-leak
/test/send_recv
/test/send_recvmsg
/test/teardowns
/test/timeout
/test/timeout-overflow
+/test/unlink
/test/wakeup-hang
/test/*.dmesg
