Continue clean-up of JTAG driver interface:

- Move all interface_jtag_* functions to jtag_driver.c.
- Extern command queue routines in jtag.h (with INCLUDE_JTAG_INTERFACE_H).
- Add new source file to automake inputs.


git-svn-id: svn://svn.berlios.de/openocd/trunk@1996 b42882b7-edfa-0310-969c-e2dbd0fdcd60