Enable logcat logging in libnetd_resolv

The netd binary and libnetd_resolv.so don't share global symbols.
The resolver is statically linked to liblog and therefore contains a
separate copy of its global state, which must be initialized separately.

Test: build, flash, run "adb logcat | grep libnetd_resolv"
Change-Id: Id9b304eb25d770cafe555982c666299ab44b62fe