BLE Host - Fix SM bug - keydist use pair rsp.
BLE Host - Fix SM bug - keydist use pair rsp.

Previously we were looking at both the pair req and pair rsp.

X-Original-Commit: 3c3c49fa4b33a0b43423366879ca97836716c6d6

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