Implement block placement (#1549)

* Implement block placement

Implement a simple pass which re-orders cold blocks at the end of the
list of blocks in the CFG.

* Set PPTC version

* Use Array.Resize

Address gdkchan's feedback

ARMeilleure/Instructions/InstEmitFlowHelper.cs

@@ -174,7 +174,7 @@ namespace ARMeilleure.Instructions
                 Operand lblContinue = context.GetLabel(nextAddr.Value);
 
                 // We need to clear out the call flag for the return address before comparing it.
-                context.BranchIf(lblContinue, context.BitwiseAnd(returnAddress, Const(~CallFlag)), nextAddr, Comparison.Equal);
+                context.BranchIf(lblContinue, context.BitwiseAnd(returnAddress, Const(~CallFlag)), nextAddr, Comparison.Equal, BasicBlockFrequency.Cold);
 
                 context.Return(returnAddress);
             }