oeqa/selftest/cases/tinfoil.py: increase timeout 10->60s test_wait_event

The test would timeout on autobuilders. This patch increases the
timeout to 60s

The test will now also exit as soon as we receive the 2 expected events
Expected runtime is around 1s if successful

Bug 14158

(From OE-Core rev: be02aa92)

Signed-off-by: Yi Fan Yu <yifan.yu@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 1d803b70e599521ad0c743f49007e6fc5c055d1c)
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>