Bluetooth: BTLE: SN, NESN should be numbers not booleans

SN = Sequence Number, so it is not bool.

Change-Id: I0691b17150bbbdd34a0e7cbe3cb90058c9183ff7
Reviewed-on: https://code.wireshark.org/review/5769
Reviewed-by: Michal Labedzki <michal.labedzki@tieto.com>