Add abstraction layer for JTAG pin access to allow for different device types
Add support for different XTAG reset strategy in dbg interface
Merge branch 'master' of github.com:xcore/sc_jtag

* 'master' of github.com:xcore/sc_jtag:
  Now builds with 12.2 tools
  Add PC sampling command

Conflicts:
	app_jtag_print/Makefile
	module_xcore_debug/src/dbg_access.xc
	module_xcore_debug/src/dbg_cmd.h