Let tracefile has_memory and has_all_memory.

Let tracefile has_memory and has_all_memory.

At present, tfile target thinks it has memory but ctf doesn't.
This is an oversight when I added ctf target support.  This patch
moves the implementations of to_has_all_memory and to_has_memory to
upper layer.  After this change, both tfile and ctf target think
they have memory.

gdb:

2014-02-23  Yao Qi  <yao@codesourcery.com>

	* tracefile-tfile.c (tfile_has_all_memory): Remove.
	(tfile_has_memory): Remove.
	(init_tfile_ops): Don't set fields to_has_all_memory and
	to_has_memory of tfile_ops.
	* tracefile.c (tracefile_has_all_memory): New function.
	(tracefile_has_memory): New function.
	(init_tracefile_ops): Initialize fields to_has_all_memory and
	to_has_memory of 'ops'.