[OE-core] package.bbclass: Handle subprocess errors correctly

[Chris Larson]

On Mon, Mar 25, 2013 at 9:54 AM, Richard Purdie <
richard.purdie at linuxfoundation.org> wrote:

> If an error occurs in subprocess.call() we currently don't catch it. In
> particular
> we have issues where debugedit is segfaulting unnoticed. This fixes up
> various code paths to catch the errors.
>

Well spotted, at a minimum we should be using check_call(), so an
unanticipated failure results in an uncaught exception, but explicitly
checking retval makes sense as well.
-- 
Christopher Larson
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