Print interfaces/pointers when -tiny is used (#170)

fixes #167

runtime_strip.go

@@ -121,6 +121,7 @@ func stripRuntime(filename string, file *ast.File) {
 
 	if filename == "print.go" {
 		file.Decls = append(file.Decls, hidePrintDecl)
+		return
 	}
 
 	// replace all 'print' and 'println' statements in

testdata/scripts/tiny.txt

@@ -5,6 +5,7 @@ garble -tiny build
 ! binsubstr main$exe 'main.go' 'fmt/print.go'
 env GODEBUG='allocfreetrace=1,gcpacertrace=1,gctrace=1,scavenge=1,scavtrace=1,scheddetail=1,schedtrace=10'
 ! exec ./main$exe
+stderr '^\(0x[\d\w]{6,8},0x[\d\w]{6,8}\)' # interfaces/pointers print correctly
 stderr '^caller: \? 0$' # position info is removed
 stderr '^recovered: ya like jazz?'
 ! stderr 'panic: oh noes' # panics are hidden
@@ -27,6 +28,9 @@ package main
 import "runtime"
 
 func main() {
+	var v interface{} = "tada"
+	println(v)
+
 	defer func() {
 		if r := recover(); r != nil {
 			println("recovered:", r.(string))