[builtins] Add support for JS builtins written in TurboFan.

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 8eeae17aa5004e8861f410207256adf4e1461b4e..db4a157623df5214b7ea5028cbef0981a7bc517d 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1523,6 +1523,9 @@ void Genesis::InitializeGlobal(Handle<JSGlobalObject> global_object,
     SimpleInstallFunction(math, "imul", Builtins::kMathImul, 2, true);
     SimpleInstallFunction(math, "max", Builtins::kMathMax, 2, false);
     SimpleInstallFunction(math, "min", Builtins::kMathMin, 2, false);
+    Handle<JSFunction> math_sqrt =
+        SimpleInstallFunction(math, "sqrt", Builtins::kMathSqrt, 1, true);
+    native_context()->set_math_sqrt(*math_sqrt);
   }
 
   {  // -- A r r a y B u f f e r