go/internal/gccgoimporter: recognize "any" as a builtin type

In CL 536715 we're changing the gofrontend export data to report
"any" as a builtin type. This permits us to distinguish the builtin
type from some other package-level type "any". That requires an update
to this code.

Change-Id: I91d75a056a155fa9892c4b25ab396cb4d39cc8e4
Reviewed-on: https://go-review.googlesource.com/c/go/+/537195
Reviewed-by: Than McIntosh <[email protected]>
Reviewed-by: David Chase <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Cherry Mui <[email protected]>

Author: ianlancetaylor

src/go/internal/gccgoimporter/parser.go

@@ -902,6 +902,7 @@ const (
 	gccgoBuiltinERROR      = 19
 	gccgoBuiltinBYTE       = 20
 	gccgoBuiltinRUNE       = 21
+	gccgoBuiltinANY        = 22
 )
 
 func lookupBuiltinType(typ int) types.Type {
@@ -926,6 +927,7 @@ func lookupBuiltinType(typ int) types.Type {
 		gccgoBuiltinERROR:      types.Universe.Lookup("error").Type(),
 		gccgoBuiltinBYTE:       types.Universe.Lookup("byte").Type(),
 		gccgoBuiltinRUNE:       types.Universe.Lookup("rune").Type(),
+		gccgoBuiltinANY:        types.Universe.Lookup("any").Type(),
 	}[typ]
 }