Merge BT 4.1 features

The features include:
- LE Peripheral Mode
- Link Layer topology (LE Central & Peripheral Concurrency)
- Dual Mode Topology (Ability to choose LE transport when connecting with
other Dual Mode devices)
- Fast advertising Interval
- Limited Discovery Time Changes
- GAP Authentication and Lost Bond
- Dual Mode Addressing
- Common Profile and Service Error Code
- 32 bit UUIDs

Change-Id: Ic6701da4cf6aaa390ff2c8816b43157f36b7fb42

Conflicts:
	stack/btu/btu_hcif.c