Make surgical

Im still testing, but this makes things easier to build in memory
As preserves the important output files, so can upload all @ once
Also keeps some output files, so in theory it can reduce build times.

After more testing will report back, currently it builds 6/20 nightlies for all devices in 28GB all in RAM.... not bad

Change-Id: Iaad1c4eaed1b8a56256f89fc92e8ea91c5c3ea79
Make biopsy

An interesting way to make building in mass on SSD a bit better.  It just whittles away a few 100 MD from each build.  But x 35 it added up to 17 GB
Granted that only adds room for 2 more devide builds

Not a perfect solution, but it helps

Change-Id: I4f56c52ede41e6928ae05533c58ce1a42f634500
Merge "Make surgical" into jb43
Merge "Make biopsy" into jb43