configure: Avoid non-portable 'test -o/-a'

configure: Avoid non-portable 'test -o/-a'

POSIX says that it is better to use &&/|| and two separate test
invocations than it is to try and use -a and -o (in fact, there
are some tests that are inherently ambiguous to parse if the
user passes in corner-case input like "(").

Since we cannot guarantee which shell runs configure, we cannot
rely on -o/-a always following bash's parser rules.

Signed-off-by: Eric Blake <[email protected]>
Reviewed-by: Peter Maydell <[email protected]>
Reviewed-by: Philippe Mathieu-Daudé <[email protected]>
Tested-by: Philippe Mathieu-Daudé <[email protected]>
Message-Id: <20190205023937[email protected]>
Signed-off-by: Laurent Vivier <[email protected]>