Push wpa_supplicant modules down to the leaf product config.

Since 558477c0b2a5a7db679c1ad7551d43e6364d1df2 in
external/wpa_supplicant_8 we don't need those modules if
WPA_SUPPLICANT_VERSION is not set by the BoardConfig.mk.

Change-Id: Ibb786065da6d1a12159945f415102f6a9704e248
Fix deb build.

Deb needs the wpa_supplicant modules too.

Bug: 11966814
Change-Id: Ib4b2142c5ced870fdce74ef3a1c2520ee8489226