gitmodules: Update libgwater

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
eventdctl: Avoid g_error() usage

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
eventd: Document exit status

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
eventd: Avoid g_error() usage

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>