[Proxies] Support constructable proxy as new.target (reland)

src/arm/builtins-arm.cc

Index: src/arm/builtins-arm.cc
diff --git a/src/arm/builtins-arm.cc b/src/arm/builtins-arm.cc
index df1fd0c192cb241ba3967eeda27b3b0c3009c42b..49242bd18a92699613226e46c013ee82e925eb0d 100644
--- a/src/arm/builtins-arm.cc
+++ b/src/arm/builtins-arm.cc
@@ -1754,10 +1754,9 @@ void Builtins::Generate_ConstructFunction(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r0 : the number of arguments (not including the receiver)
   //  -- r1 : the constructor to call (checked to be a JSFunction)
-  //  -- r3 : the new target (checked to be a JSFunction)
+  //  -- r3 : the new target (checked to be a constructor)
   // -----------------------------------
   __ AssertFunction(r1);
-  __ AssertFunction(r3);
 
   // Calling convention for function specific ConstructStubs require
   // r2 to contain either an AllocationSite or undefined.