qtest: bump pxe-test timeout to 10 minutes

The pxe-test uses the boot_sector_test() function, and that already
uses a timeout of 600 seconds. So adjust the timeout on the meson
side accordingly.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
[thuth: Bump timeout to 600s and adjust commit description]
Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20231215070357.10888-7-thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

tests/qtest/meson.build

@@ -4,6 +4,7 @@ slow_qtests = {
   'npcm7xx_pwm-test': 300,
   'qom-test' : 900,
   'test-hmp' : 240,
+  'pxe-test': 600,
 }
 
 qtests_generic = [