hostapd: fix ACS behavior when 11n is disabled

If 11n is disabled during compile time (CONFIG_IEEE80211N) or during
runtime (ieee80211n=0), ACS code would fail to complete interface init.

Handle these cases correctly by calling the setup completion function.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
hostapd: ACS: set correct ht_capab when no HT40 is not chosen

If HT40 is enabled for ACS, but we fail to select a secondary channel
for any reason (usually regulatory), the ht_capab must be stripped
of the HT40-support capability.

Signed-off-by: Arik Nemtsov <arik@wizery.com>
hostapd: modifications for compilation on ARM

- added .config file for libnl2.0 + nl80211 driver
- sourceme file (env to be changed per computer)
- build_wpa.sh (build command to be changed per computer)
- made changes to makefiles to compile statically with libnl + openssl