pyshark needs libxslt1-dev

[rmoriz]

fixes:

  File "probeSniffer.py", line 9, in <module>
    import pyshark
  File "/usr/local/lib/python3.5/dist-packages/pyshark/__init__.py", line 13, in <module>
    from pyshark.capture.live_capture import LiveCapture
  File "/usr/local/lib/python3.5/dist-packages/pyshark/capture/live_capture.py", line 5, in <module>
    from pyshark.capture.capture import Capture
  File "/usr/local/lib/python3.5/dist-packages/pyshark/capture/capture.py", line 15, in <module>
    from pyshark.tshark.tshark_xml import packet_from_xml_packet, psml_structure_from_xml
  File "/usr/local/lib/python3.5/dist-packages/pyshark/tshark/tshark_xml.py", line 4, in <module>
    import lxml.objectify
ImportError: libxslt.so.1: cannot open shared object file: No such file or directory

on Raspbian Lite (Stretch, latest)