Add documentation for new record Python bindings.

Signed-off-by: Tim Wiederhake <tim.wiederhake@intel.com>

gdb/ChangeLog:

	* NEWS: Add record Python bindings entry.

gdb/doc/ChangeLog:

	* python.texi (Recordings In Python): New section.

Change-Id: Ibacb5930085bff36b0003fde30db9a8178cb280b