ci/lava: Set lava-signal to kmsg

By default, LAVA emit signals as specific lines of message to the
console serial for subsequent parsing. However, this is prone to be
interleaved with the dmesg messages, particularly with debug messages
that can happen just after the process exit, such as the ones set by
CONFIG_STACK_DEBUG_USAGE Kconfig.

Setting the `lava-signal` to `kmsg` will make those special messages to
be dumped to /dev/kmsg, where the each line is printed atomically

Signed-off-by: Guilherme Gallo <guilherme.gallo@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15938>

.gitlab-ci/lava/lava_job_submitter.py

@@ -123,6 +123,7 @@ def generate_lava_yaml(args):
       'definitions': [ {
         'name': 'mesa',
         'from': 'inline',
+        'lava-signal': 'kmsg',
         'path': 'inline/mesa.yaml',
         'repository': {
           'metadata': {