build: don't use a fixed filename in temp

Fixes #2688

R=golang-dev, gri, rsc
CC=golang-dev
https://golang.org/cl/5539050

diff --git a/doc/progs/run b/doc/progs/run
index 2a76d6b2da093de2edf5c1ee3924c6947f662cab..5a2b7865163eccca38b2c6225985a72e804ecb26 100755 (executable)
--- a/doc/progs/run
+++ b/doc/progs/run
@@ -68,7 +68,7 @@ for i in \
 done
 
 # Write to temporary file to avoid mingw bash bug.
-TMPFILE="/tmp/gotest3"
+TMPFILE="/tmp/gotest3.$USER"
 
 function testit {
        $LD $1.$O