MFT [c1714a7842] [abb89bd18e] [21b65f2b04]

For staging:

1. Need to stage before packaging
2. Add explicit "stage" target for log output grouping
3. When staging, don't call "install-mtree" as it is not used
4. Fix pre-install / touching before install support due to not calling
   "install-mtree" anymore and instead check on "run-depends". Also warn
   that any findings may be due to STAGING.