goyacc: clean up after units

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5286047

diff --git a/src/cmd/goyacc/Makefile b/src/cmd/goyacc/Makefile
index ac0f427cc5c1df340a84bb56d9bab0d27db0f1a0..87b3470c6a3c1f697a12312033212efd46a8eb80 100644 (file)
--- a/src/cmd/goyacc/Makefile
+++ b/src/cmd/goyacc/Makefile
@@ -15,3 +15,4 @@ units: goyacc units.y
        $(GC) y.go
        $(LD) -o units y.$O
 
+CLEANFILES += units y.go y.output