vchoi_fork

[svn-r11179] Purpose:
Feature: check-clean target

Description:
'make check-clean' cleans up output files from tests.

Solution:
Tests create foo.chkexe and foo.log files.  Scripts create foo.chksh and
foo.logsh files.  'make check-clean' will clean these files up so that
the tests can be re-run.
Also suppressed some not-very-useful output of Makefiles when it would
echo commands.

Platforms tested:
mir, sleipnir, modi4

Misc. update: