keepalived: add patch to remove log message on json output

keepalived: add patch to remove log message on json output

The 'luci-app-keepalived' uses the status json output to parse this
information for the status page. The problem is that when the LuCI
status page is open in the browser, the query is logged every 3 second into
the syslog. This is not needed and can therefore be removed.

This patch was already merged upstream:
https://github.com/acassen/keepalived/commit/6cce75f4eb65551a61d2e4ba775637b288c1d592

Signed-off-by: Florian Eckert <redacted>