hostapd: T5151: Override ConditionFileNotEmpty

Debian's debian/2%2.10-12 update of the hostap packaging added a
ConditionFileNotEmpty directive for /etc/hostapd/<...> paths, which
doesn't match the /run/hostapd/<...> paths that VyOS uses. This commit
updates the override file to use the proper VyOS paths.

https://salsa.debian.org/debian/wpa/-/commit/d204ceb5a2dc33db888eb55b5fee542a1005e69c

Signed-off-by: Andrew Gunnerson <accounts+github@chiller3.com>