purge obsolete EVAL #ifdefs

clearly, nobody's been maintaining them for an extended period of time.

Change-Id: I41c6b40026f107d34f7964934f36bc727fb6b795
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
purge buildkey-related dead code

Change-Id: I196dbe33b349d437450a5ea68befb3d6bfe1b574
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
purge dead output-related code

QTBUILDINSTRUCTION is not evaluated anywhere anymore.

Change-Id: Ie23f61f5a25594591efdafdc49e279f13623b049
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
reality adjustment: rename generateSystemVars() => prepareConfigTests()

Change-Id: I3f9cd8b8cdb54d682d0207f28168f4e518b98280
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
move detectArch() call right after autoDetection()

it belongs there (technically, it would not hurt to actually call it
from within autoDetection()).

Task-number: QTBUG-31095
Change-Id: I7eb53762513eb9cebfd22317c8f44fe123eb91dd
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@digia.com>