internal/abi: fix comment on NonEmptyInterface

Change-Id: Ia3f4e844049caf11ae67d1bd6dd48350f51c532f
Reviewed-on: https://go-review.googlesource.com/c/go/+/684375
Reviewed-by: David Chase <drchase@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>

src/internal/abi/iface.go

@@ -26,7 +26,7 @@ type EmptyInterface struct {
 	Data unsafe.Pointer
 }
 
-// EmptyInterface describes the layout of an interface that contains any methods.
+// NonEmptyInterface describes the layout of an interface that contains any methods.
 type NonEmptyInterface struct {
 	ITab *ITab
 	Data unsafe.Pointer