Merge remote-tracking branch \'toybox/master\' into HEAD am: 498e61d5a4 am: 5cf25606a1

Merge remote-tracking branch \'toybox/master\' into HEAD am: 498e61d5a4 am: 5cf25606a1
am: 2b493c18d2

* commit '2b493c18d2bbb4fd4efb414d67e824fa5da56036':
  Use CFG_TOYBOX_NORECURSE to avoid <strike>all that tedious mucking about with hyperspace</strike> stack measuring in ways that confuse security stuff.
  Work around increasingly insane compiler developers wanting to make everything undefined behavior so the optimizer can silently eliminate your entire program.

Change-Id: I92bcd00db61be8a22339ea849e84359a49befdc7