make successful logs available + clean up logs

[ddyer0]

There is so much crap in build logs, that when a build fails it's difficult just to sort through the junk to locate hints about the true failure. Attached is a sample IOS build which contains hundreds of warnings, which I presume are mostly "normal".

It would help a lot if the normal state of the logs were free of this noise. But it would ALSO be greatly useful to have had a log from a successful build available for comparison. Making logs from successful builds available ought to be pretty simple.

[ddyer0]

here's a sample log.

error(7).txt