tests/qtest: Add missing qtest_quit() to stm32 tests

In the dm163-test and stm32l4x5_usart-test, a couple of subtests are
missing the qtest_quit() call.  The effect of this is that on hosts
other than Linux and FreeBSD the test will timeout after executing
all the tests:

242/845 qemu:qtest+qtest-arm / qtest-arm/dm163-test                               TIMEOUT         60.04s   3 subtests passed
100/845 qemu:qtest+qtest-arm / qtest-arm/stm32l4x5_usart-test                     TIMEOUT        600.02s   5 subtests passed

This happens because the qemu-system-arm binary which the test
starts does not exit, and because it shares the stdout with the
test binary, the overall meson test harness thinks the test is
still running. On Linux and FreeBSD we have an extra safety net
set up in qtest_spawn_qemu() which kills off any QEMU binary that
ends up without a parent. This is intended for the case where
QEMU crashed and didn't respond to a SIGTERM or polite request
to quit, but it also sidestepped the problem in this case.
However, OpenBSD doesn't have a PDEATHSIG equivalent, so we
see the timeouts when running a 'make vm-build-openbsd' run.

Add the missing qtest_quit() calls.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-id: 20240905165554.320577-2-peter.maydell@linaro.org
2 files changed