set TARGET_ARM_EABI_VERSION
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.

Based on:
https://android.googlesource.com/device/lge/mako/+/821cdef6635d091820cbd429853dd858b6fbae17