logd: check return values

The setgid() and setuid() call failure in logd.daemon thread
do not block overall functionality, so clearly tell static
analyzer and developers that we do not care to check their
return values.

SideEffects: None

Bug: 27434072
Change-Id: I6fdc87e8311ebc0173716080bbd72c86b3f00f78
1 file changed