gdb/gdbserver/

gdb/gdbserver/
	Fix overlapping memcpy.
	* mem-break.c (set_raw_breakpoint_at): New variable buf.  Use it for
	the read_inferior_memory transfer.
	(delete_fast_tracepoint_jump): New variable buf.  Use it for the
	write_inferior_memory transfer.
	(set_fast_tracepoint_jump): New variable buf.  Use it for the
	read_inferior_memory and write_inferior_memory transfers.
	(uninsert_fast_tracepoint_jumps_at, reinsert_fast_tracepoint_jumps_at)
	(delete_raw_breakpoint, uninsert_raw_breakpoint): New variable buf.
	Use it for the write_inferior_memory transfer.
	(check_mem_read, check_mem_write): New gdb_asserts for overlapping
	buffers.