Disable TestSendLog on the buildbots

TestSendLog sometimes hangs on the buildbot, although it has never
been reproduced locally.  The cause appears to be a unix domain
packet that was sent but never received.  Skip the test in short
mode for now, which will leave it manually runnable but not run
it as part of the build.

Fixes: 120596545
Test: m nothing
Change-Id: I3e6bc9b5f1d9c15dc9a7294d98cbd917d0637c44

ui/build/paths/logs_test.go

@@ -26,6 +26,9 @@ import (
 )
 
 func TestSendLog(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping in short mode, sometimes hangs")
+	}
 	t.Run("Short name", func(t *testing.T) {
 		d, err := ioutil.TempDir("", "s")
 		if err != nil {