build: Save per-component build logs to log file
Create a per-component log file at
${SHRINKWRAP_BUILD}/log//.log, into which all of the
component's stdout and stderr are streamed. This is done always
regardless of --verbose. Writing is line buffered to allow live use of
(e.g.) tail -f <log>
.
Signed-off-by: Ryan Roberts ryan.roberts@arm.com