logd: start logd services in logd gid

logd - start as root:logd+system+readproc
logd-reinit - start as logd:logd

ToDo: start as logd:logd+system+readproc (libminijail)
Test: gTest logd-unit-tests, liblog-unit-tests and logcat-unit-tests
Bug: 32450474
Change-Id: I42c806ca1730a7f9eb9e34f064ae31a2ef9fc678
1 file changed