cmd/gc: rebuild builtin.c

Was not in sync with runtime.go, but the diffs
didn't really matter, so nothing broke.

R=ken2
CC=golang-dev
https://golang.org/cl/6733057

src/cmd/gc/builtin.c

@@ -28,8 +28,6 @@ char *runtimeimport =
 	"func @\"\".appendstr(@\"\".typ *byte, @\"\".x []byte, @\"\".y string) (? []byte)\n"
 	"func @\"\".cmpstring(? string, ? string) (? int)\n"
 	"func @\"\".eqstring(? string, ? string) (? bool)\n"
-	"func @\"\".slicestring(? string, ? int, ? int) (? string)\n"
-	"func @\"\".slicestring1(? string, ? int) (? string)\n"
 	"func @\"\".intstring(? int64) (? string)\n"
 	"func @\"\".slicebytetostring(? []byte) (? string)\n"
 	"func @\"\".slicerunetostring(? []rune) (? string)\n"
@@ -37,7 +35,7 @@ char *runtimeimport =
 	"func @\"\".stringtoslicerune(? string) (? []rune)\n"
 	"func @\"\".stringiter(? string, ? int) (? int)\n"
 	"func @\"\".stringiter2(? string, ? int) (@\"\".retk int, @\"\".retv rune)\n"
-	"func @\"\".copy(@\"\".to any, @\"\".fr any, @\"\".wid uint32) (? int)\n"
+	"func @\"\".copy(@\"\".to any, @\"\".fr any, @\"\".wid uintptr) (? int)\n"
 	"func @\"\".slicestringcopy(@\"\".to any, @\"\".fr any) (? int)\n"
 	"func @\"\".typ2Itab(@\"\".typ *byte, @\"\".typ2 *byte, @\"\".cache **byte) (@\"\".ret *byte)\n"
 	"func @\"\".convI2E(@\"\".elem any) (@\"\".ret any)\n"
@@ -79,7 +77,7 @@ char *runtimeimport =
 	"func @\"\".selectnbsend(@\"\".chanType *byte, @\"\".hchan chan<- any, @\"\".elem any) (? bool)\n"
 	"func @\"\".selectnbrecv(@\"\".chanType *byte, @\"\".elem *any, @\"\".hchan <-chan any) (? bool)\n"
 	"func @\"\".selectnbrecv2(@\"\".chanType *byte, @\"\".elem *any, @\"\".received *bool, @\"\".hchan <-chan any) (? bool)\n"
-	"func @\"\".newselect(@\"\".size int) (@\"\".sel *byte)\n"
+	"func @\"\".newselect(@\"\".size int32) (@\"\".sel *byte)\n"
 	"func @\"\".selectsend(@\"\".sel *byte, @\"\".hchan chan<- any, @\"\".elem *any) (@\"\".selected bool)\n"
 	"func @\"\".selectrecv(@\"\".sel *byte, @\"\".hchan <-chan any, @\"\".elem *any) (@\"\".selected bool)\n"
 	"func @\"\".selectrecv2(@\"\".sel *byte, @\"\".hchan <-chan any, @\"\".elem *any, @\"\".received *bool) (@\"\".selected bool)\n"