test: minor fixes in run and testlib

Can tell this doesn't get run very often, but it is still important
for when you've broken everything else.

R=golang-dev, r
CC=golang-dev
http://codereview.appspot.com/6547065

1 files changed, 2 insertions, 0 deletions

diff --git a/test/run b/test/run
index 29a7905f0..d206312a2 100755
--- a/test/run
+++ b/test/run
@@ -54,6 +54,8 @@ true >pass.out >times.out
 exclude=false	# exclude nothing
 golden=golden.out
 
+rm -f tmp.go  # generated by some tests, left behind if interrupted
+
 filterout() {
 	grep '^'"$2"'$' $1 >/dev/null
 }