automation: collect log files in subdirectories

The current single *.log pattern collects just config.log, which
usually contains little useful information.
Collect also log files in subdirectories, tools/config.log usually
contains information about configure failures.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
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