cmd/compile: fix fmt_test.go after CL 170062

Updates #22326.

Change-Id: Ia9173b6eb29b2a4f90f4ba39bf53b6e9b7a6d6bf
Reviewed-on: https://go-review.googlesource.com/c/go/+/179398
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/cmd/compile/fmtmap_test.go

@@ -65,7 +65,6 @@ var knownFormats = map[string]string{
 	"*math/big.Int %s":                                "",
 	"*math/big.Int %v":                                "",
 	"[16]byte %x":                                     "",
-	"[]*cmd/compile/internal/gc.Node %v":              "",
 	"[]*cmd/compile/internal/ssa.Block %v":            "",
 	"[]*cmd/compile/internal/ssa.Value %v":            "",
 	"[][]string %q":                                   "",
@@ -172,6 +171,7 @@ var knownFormats = map[string]string{
 	"interface{} %s":                                  "",
 	"interface{} %v":                                  "",
 	"map[*cmd/compile/internal/gc.Node]*cmd/compile/internal/ssa.Value %v": "",
+	"map[*cmd/compile/internal/gc.Node][]*cmd/compile/internal/gc.Node %v": "",
 	"map[cmd/compile/internal/ssa.ID]uint32 %v":                            "",
 	"math/big.Accuracy %s": "",
 	"reflect.Type %s":      "",
@@ -202,6 +202,7 @@ var knownFormats = map[string]string{
 	"uint64 %d":            "",
 	"uint64 %x":            "",
 	"uint8 %d":             "",
+	"uint8 %v":             "",
 	"uint8 %x":             "",
 	"uintptr %d":           "",
 }