hostapd: set VARIANT=* for wpa-cli, hostapd-utils

hostapd: set VARIANT=* for wpa-cli, hostapd-utils

19aae94 [build: avoid rebuilds of unset VARIANT packages] builds
packages defined without a VARIANT only once, using the first VARIANT
defined in the Makefile.

This caused problems with wpa-cli, as it is only built for variants that
include supplicant support, and the first VARIANT defined may not build
it.

The same happens to hostapd-utils, which is not built for
supplicant-only variants.

To circumvent this, set VARIANT=* for both packages so that they get
built for every defined variant.  This should not cause spurious
rebuilds, since tey are not a dependency of any other package defined in
this Makefile.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>