Fix first issue of https://github.com/teawater/kgtp/issues/6
The issue about rw_verify_area is because when got $qXfer:traceframe-info:read::0,45b# (gtp_gdbrsp_qxfer_traceframe_info_read) KGTP should return error if in *no tfind* mode or in replay mode.
And I checked the normal gdb and gdbserver, if gdbserver get a "qXfer:traceframe-info:read" when it is in *no tfind* mode, it will return "E01".

So I updated gtp_gdbrsp_qxfer_traceframe_info_read in this patch.
When gtp_gdbrsp_qxfer_traceframe_info_read is called if in *no tfind* mode or in replay mode, return error.
Merge branch 'githubissue6' of github.com:teawater/kgtp into githubissue6