gdb: add create_new_frame(frame_id) overload

The subsequent patches will need to call create_new_frame with an
existing frame_id representing a user created frame.  They could call
the existing create_new_frame, passing both addresses, but it seems
nicer to have a version of the function that takes a frame_id directly.

Change-Id: If31025314fec0c3e644703e4391a5ef8079e1a32
Reviewed-By: Bruno Larsen <blarsen@redhat.com>