scratch: fix build

Add missing import.

Change-Id: I60af3bb700c0a21ed5b605bcba368d0f32d059ba
Reviewed-on: https://go-review.googlesource.com/105395
Run-TryBot: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
diff --git a/chimeracoder/main.go b/chimeracoder/main.go
index b5c871d..79f8d1b 100644
--- a/chimeracoder/main.go
+++ b/chimeracoder/main.go
@@ -4,6 +4,10 @@
 
 package main
 
+import (
+	"fmt"
+)
+
 func main() {
 	fmt.Println("Hello, world!")
 	fmt.Println(" - Sent from my XPS 13 running Debian")
diff --git a/matloob/main.go b/matloob/main.go
index 116aeb1..d34a08f 100644
--- a/matloob/main.go
+++ b/matloob/main.go
@@ -5,6 +5,10 @@
 // This tool proclaims the ruliness of tools.
 package main
 
+import (
+	"fmt"
+)
+
 func main() {
 	fmt.Println("Tools Rule!")
 }