[DO-1183] Make manifest specific work in secure environment

Signed-off-by: Ben Chalmers <Ben.Chalmers@citrix.com>
[DO-1193] Add semi-whqled drivers to secure build manifest

Signed-off-by: Ben Chalmers <Ben.Chalmers@citrix.com>
[DO-1220] Add --buildoutput arg to specify where to find build output for autocommit

Signed-off-by: Ben Chalmers <Ben.Chalmers@citrix.com>
Merge pull request #73 from benchalmers/securemerge

Change sets to allow installer to work within the secure build environment

Approved-By: Ben.Chalmers@citrix.com