run_smoke_test.sh: Print what failed instead of just that it failed
run_smoke_test.sh: Print what failed instead of just that it failed

It was already setting $msg to a useful message, but it never showed it
to the user.

Signed-off-by: Luke Shumaker <1abe3165bcc8c29e8b31e5c88636540fb9350004@datawire.io>

datawire/telepresence,datawire/telepresence,datawire/telepresence