Tidy up problems with rolled forward code base.

	* arc-tdep.c (arc_print_frame_info): Pass gdbarch as argument and
	use with print_core_address ().
	(arc_is_callee_saved): Pass gdbarch as argument and use when
	calling arc_print_frame_info ().
	(arc_is_in_prologue): Pass gdbarch as argument and use when
	calling arc_is_callee_saved ().
	(arc_scan_prologue): Pass gdbarch to arc_is_in_prologue ().
	(arc_skip_prologue): No need to call deprecated_pc_in_call_dummy,
	since we are always called with a valid PC.
	* Makefile.in (HFILES_NO_SRCDIR): Remove call-cmds.h,
	gdb_string.h.