host/mesh: Fixes Friend Queue store message
host/mesh: Fixes Friend Queue store message

If the SRC field of the received message is a unicast
address of an element of the Low Power node, then the
message shall not be stored in the Friend Queue.

Otherwise, lpn will discard this message, eventually
it breaks friendship.

this is port of 5b11c053efcb6eec351bb275020fdac9ed6592d9

apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble