Bug 930808 - Catch all exceptions when importing psutil; r=glandium

This is the same workaround applied in 7be399d00f9a (bug 908296). It
should stop |make check| from complaining on OS X.

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extra : rebase_source : 7cf18c8261d375437187a1c256b0b7f8ae0cbb30
extra : amend_source : 952eef1f385962005833c12f643ebb5ea02c93f3
extra : histedit_source : 285bda4330b2997afcc048ecc81f84173d422582
Bug 930808 - Upgrade to psutil 2.1.3; r=glandium

psutil 2.1.3 is replacing psutil 1.0.1. There are numerous bug fixes and
feature enhancements in psutil worth obtaining.

Source code was obtained from
https://pypi.python.org/packages/source/p/psutil/psutil-2.1.3.tar.gz and
uncompressed into python/psutil without modification except for the
removal of the egg-info directory and the .travis.yml file.

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extra : source : 697eb6db7d96dc21e817cd27a7e46ed4ab00f9bb