[gdbserver] Split a new tracepoint.h file out of server.h.

[gdbserver] Split a new tracepoint.h file out of server.h.

gdb/gdbserver/
2013-09-05  Pedro Alves  <palves@redhat.com>

	* ax.c, linux-low.c, linux-x86-low.c, server.c: Include
	tracepoint.h.
	* server.h (IPA_BUFSIZ, initialize_tracepoint, tracing)
	(disconnected_tracing, tracepoint_look_up_symbols, stop_tracing
	(handle_tracepoint_general_set, handle_tracepoint_query)
	(tracepoint_finished_step, tracepoint_was_hit)
	(release_while_stepping_state_list, current_traceframe)
	(in_readonly_region, traceframe_read_mem)
	(fetch_traceframe_registers, traceframe_read_sdata)
	(traceframe_read_info, struct fast_tpoint_collect_status)
	(fast_tracepoint_collecting, force_unlock_trace_buffer)
	(handle_tracepoit_bkpts, initialize_low_tracepoint)
	(supply_fast_tracepoint_registers)
	(supply_static_tracepoint_registers, set_trampoline_buffer_space)
	(ipa_tdesc, claim_trampoline_space)
	(have_fast_tracepoint_trampoline_buffer, gdb_agent_about_to_close)
	(agent_mem_read, agent_get_trace_state_variable_value)
	(agent_set_trace_state_variable_value, agent_tsv_read)
	(agent_mem_read_string, get_raw_reg_func_addr)
	(get_get_tsv_func_addr, get_set_tsv_func_addr): Move to ...
	* tracepoint.h: ... this new file.