librpc: Remove static qualifier to fix warning

Change-Id: Idac9c01800cbe0d19401311f2c6e9092ca992250
time: Use wait4 instead of wait3

Lollipop doesn't have wait3 anymore

Change-Id: I370532c9948ad352fd2e36bd0073df71deef89e8
networking/interface.c: if_inet6 is already defined on Lollipop

Change-Id: Ia17c276c599769380d4cad209ae0b4911dd5f886
busybox: Use new path for arpa_nameser.h

arpa_nameser.h was moved out of libc/private into libc/include/arpa/nameser.h in bionic.

Change-Id: I5762e06c21d39d3c894b4916627b07fcb4de3c25