[BareMetal] Integrate with the KEIL uVision debugger

It would be good to have a KEIL v5.xxx debugger integration.

The KEIL provides the UVSC API which allows to do this:

http://www.keil.com/appnotes/docs/apnt_198.asp

But, I have found a strange issues with the UVSC API, which are causes the following limitations:

1) It is impossible to fetch of an addresses of a local variables (except the structs and the arrays).

2) It is impossible to fetch a root/main stack info: the returned address, file name, function are empty.

3) It is impossible to get the current location after the 'step-into' and the 'step-over' execution from the root/main stack: always returned "undefined" error with an empty frame address.

4) Also there are present some bugs at enumeration of a members of local variables for the structures: its members has a wrong values at its initializations.

I have created the pre-liminary implementation here: https://github.com/denis-shienkov/qt-creator/tree/uvsc

== What does work ==

1) Enumeration of a registers view (read/write).
2) Enumeration of a local variables view (read/write).
3) Enumeration of a warchers view (read/write).
4) Start/stop debugging.
5) Step-in (replaced by step-by-instruction, because only it does work)
6) Step-over (replaced by step-by-instruction, because only it does work)
7) Step-out
8) Step-by-instruction
9) Disassembler view.
10) Break-points
11) Enumeration of a stack frames.
12) Enumeration of a threads (tasks)
13) Update the current location (marker/cursor)

== Kits ==

1) Implemented auto-detection of a KEIL compilers
2) Implemented auto-detection of a uVision debugger.
3) Implemented wizard for choosing of the debug providers.

== What is debug provider does work ==

1) Implemented the Simulator (for ARM, STM32).
2) Implemented ST-Link debugger (for ARM STM32)