This CL splits out the testing subpart of utman.sh into a separate script

This CL splits out the testing subpart of utman.sh into a separate testing 
script: utman-test.sh

There is essentially no coupling between testing and the rest of the utman 
script  so this will reduce the size of the massive utman.sh by 10% without 
much surgery.

Going forward this separation allows us to unify utman-test.sh
with  the build bot scripts
buildbot/buildbot_pnacl1.sh and buildbot/buildbot_pnacl2.sh.
This should help eliminate code duplication and ensure that we run
the same tests for local pnacl toolchain builds and on the bots.

BUG= http://code.google.com/p/nativeclient/issues/detail?id=1647
Committed: http://src.chromium.org/viewvc/native_client?view=rev&revision=5382

[robertm, 2011-05-20 15:37:42]

PTAL

[(google.com) Derek Schuff, 2011-05-20 15:48:28]

LGTM

[jvoung - send to chromium..., 2011-05-20 16:46:31]

LGTM