PM will be used for SoftDevices s13x, otherwise DM will be used.
Fix - security key distribution settings - Signing is not supported.
declare usage of encryption LTK and IRK if boonding enabled
deleted unused local reference to nRF5xGap class in bleGattcEventHandler.
fix PM internal bug (For gcc with -0s optimization an application fail to save a boonding data)
fuse redeclaration of PACKED macro in nRF5 SDK sources
In the process, the path has been shortened and the unecessary ble
directory between FEATURE_BLE and the actual implementation has been
removed.
commit id of ARMmbed : 17728a824c7273e16b6b74fae871e2997c88ecd1