Mesos libs in LD_LIBRARY_PATH cause fetcher to fail and not report errors

in 1.0.0, if the agent is launched such that the mesos libraries can only be found under LD_LIBRARY_PATH, the fetcher will fail and simply exit with no output. The log will not show linker errors. I'm not sure where they are swallowed. If the task is launched with LD_LIBRARY_PATH set to include where the mesos libs can be found, the fetcher functions as expected.

The problem is that the errors in the fetcher linking are not obvious as no logs are produced from the fetcher sub process.