configure: correct error message to suggest --disable-open-zfile

When one of the compression helper programs is not found, the message
suggesting how to compile without it should say --disable-open-zfile,
not --disable-stat-zfile.

Fixes: 515294bb ("Fix CVE-2022-4883: compression commands depend on $PATH")
Closes: #4

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>