cmd/compile: simplify printing of constant bools

Change-Id: I9339e83e39075826bf5819e55804a94208fe84ae
Reviewed-on: https://go-review.googlesource.com/38140
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

src/cmd/compile/internal/gc/fmt.go

@@ -433,11 +433,7 @@ func (v Val) vconv(s fmt.State, flag FmtFlag) {
 		fmt.Fprint(s, strconv.Quote(u))
 
 	case bool:
-		t := "false"
-		if u {
-			t = "true"
-		}
-		fmt.Fprint(s, t)
+		fmt.Fprint(s, u)
 
 	case *NilVal:
 		fmt.Fprint(s, "nil")