Temporary disable string-interpolation constant folding until failures witj --optimization-counter-…

runtime/vm/flow_graph_optimizer.cc

Index: runtime/vm/flow_graph_optimizer.cc
===================================================================
--- runtime/vm/flow_graph_optimizer.cc	(revision 28746)
+++ runtime/vm/flow_graph_optimizer.cc	(working copy)
@@ -6217,6 +6217,11 @@
 
 
 void ConstantPropagator::VisitStringInterpolate(StringInterpolateInstr* instr) {
+  // TODO(srdjan): Remove the code below and enable constant folding once
+  // issue resolved.
+  SetValue(instr, non_constant_);
+  return;
+
   if (IsNonConstant(instr->constant_value())) {
     // Do not bother with costly analysis if we already know that the
     // instruction is not a constant.