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 <eblake@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190205023937.18245-1-eblake@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>