message: Increase permitted graph coloring iteration count
  Summary:
  Dyna builds have some methods requiring >200 iterations to converge.
  Bump to 1000.  Opened T141102123 to track investigating the high iteration count.
diff: @@ -1086,7 +1086,7 @@ void Allocator::allocate(cfg::ControlFlowGraph& cfg, bool is_static) {
  // If we've hit this many iterations, it's very likely that we've hit
  // some bug that's causing us to loop infinitely.
  - always_assert(m_stats.reiteration_count++ < 200);
  + always_assert(m_stats.reiteration_count++ < 1000);
  }
  TRACE(REG, 7, "IG:\n%s", SHOW(ig));
  