BLE Host - Fix misordered fields in unit test.
BLE Host - Fix misordered fields in unit test.

Newer versions of gcc warn about the misordered fields.  This was
causing a unit test to fail to compile under Linux.

X-Original-Commit: 48df9b088c50cfc97d2518a823294ace761633d6

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