re PR go/89406 (Go testing leaves many temporary directories in /tmp around)

PR go/89406
    net: remove unixgram test sockets
    
    Backport https://golang.org/cl/163277 from the master library.
    
    Updates https://gcc.gnu.org/PR89406
    
    Reviewed-on: https://go-review.googlesource.com/c/163200

From-SVN: r269087

gcc/go/gofrontend/MERGE

@@ -1,4 +1,4 @@
-4fbd06dc7b1b8fb665293399a2b6d5326435512f
+45a2e231958854fd945961f0335ac0805d502510
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

libgo/go/net/listen_test.go

@@ -780,6 +780,9 @@ func TestListenConfigControl(t *testing.T) {
 				continue
 			}
 			c.Close()
+			if network == "unixgram" {
+				os.Remove(address)
+			}
 		}
 	})
 }

libgo/go/net/mockserver_test.go

@@ -17,8 +17,6 @@ import (
 )
 
 // testUnixAddr uses ioutil.TempFile to get a name that is unique.
-// It also uses /tmp directory in case it is prohibited to create UNIX
-// sockets in TMPDIR.
 func testUnixAddr() string {
 	f, err := ioutil.TempFile("", "go-nettest")
 	if err != nil {

libgo/go/net/splice_test.go

@@ -242,6 +242,7 @@ func testSpliceNoUnixgram(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
+	defer os.Remove(addr.Name)
 	up, err := ListenUnixgram("unixgram", addr)
 	if err != nil {
 		t.Fatal(err)