Pull down pjdfstest 0.1

The summary of changes is as follows..

Generic changes::

• Added configure support [2].
• Check for lchmod filesystem support with create_file(..); for testcases that require lchmod, skip the testcase -- otherwise use chmod directly [1].
• Added Travis CI integration [2].
• Added utimensat testcases [1].

Linux support::

• Fixed Linux support to pass on later supported versions of Fedora/Ubuntu [2].
• Conditionally enable posix_fallocate(2) support [2].

OSX support::

• Fixed compilation on OSX [2].
• Added partial OSX support (the test run isn't fully green yet) [2].

MFC after: 2 months
Obtained from: https://github.com/pjd/pjdfstest/tree/0.1
Relnotes: yes
Submitted by: asomers [1], ngie [2]
Tested with: UFS, ZFS