go/internal/gcimporter,gccgoimporter: use types.NewInterfaceType

https://go-review.googlesource.com/c/go/+/120875 changed the name
of types.NewInterface2 to NewInterfaceType. Adjust x/tools code to
match new API.

For golang/go#25301.

Change-Id: I21e13566f7c88591a16ce461cb4cce8901980b05
Reviewed-on: https://go-review.googlesource.com/120895
Run-TryBot: Robert Griesemer <[email protected]>
TryBot-Result: Gobot Gobot <[email protected]>
Reviewed-by: Josh Bleecher Snyder <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>

Author: griesemer

go/internal/gccgoimporter/newInterface11.go

@@ -9,5 +9,5 @@ package gccgoimporter
 import "go/types"
 
 func newInterface(methods []*types.Func, embeddeds []types.Type) *types.Interface {
-	return types.NewInterface2(methods, embeddeds)
+	return types.NewInterfaceType(methods, embeddeds)
 }

go/internal/gcimporter/newInterface11.go

@@ -9,5 +9,5 @@ package gcimporter
 import "go/types"
 
 func newInterface(methods []*types.Func, embeddeds []types.Type) *types.Interface {
-	return types.NewInterface2(methods, embeddeds)
+	return types.NewInterfaceType(methods, embeddeds)
 }