Add libbase as a dependency.

CL I8efff7741ed19fd71f82f7e604b4f1c66fc5ea2b switches Looper over to
using libbase's unique_fd to handle its internal file descriptors. Add
the dependency here to track.

Bug: http://b/111560345
Test: treehugger
Change-Id: I918719184bba5cc0c4537fa4b7e86037564ac2a6
3 files changed