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

am: 5cf25606a1

* commit '5cf25606a1ad610d3b81b4549adbfa9db5dda448':
  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: Ia21afb192112caf0343f74a8953f3b4d2b449c94