Sometimes the read on the PTY can wait indefinitely if the child
dies. By using a poll statement that monitors both the output
of the child and its state we prevent this from happening.
Change-Id: I51d5556c66f039bca673145ca72db262977e1689
Abstracting the functionality of logwrapper into a library and making
use of it for the logwrapper executable.
Change-Id: I2bcf722413f3a8454c6f52137dec86c4477fb8b5