autotools.bbclass: drop 'cfgcmd' and 'Running ..' output
autotools.bbclass: drop 'cfgcmd' and 'Running ..' output

Per discussion with Enrico Scholz, there are better ways to debug problems
than this, so drop it, making it more consistent with oe_runmake and ensuring
we don't see problems with spaces in arguments.

Signed-off-by: Chris Larson <4c8c411260e601995081b113a5ef94a26eff2b25@mentor.com>

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