title: osmosdr source on rpi2: No module named _osmosdr_swig
body: <p>I'm trying to use osmosdr source in gnuradio on a raspberryPi2. 
  With osmosdr from git i get</p>
  
  <pre><code>Traceback (most recent call last):
    File "urmet.py", line 20, in &lt;module&gt;
      import osmosdr
    File "/usr/local/lib/python2.7/dist-packages/osmosdr/__init__.py", line 26, in &lt;module&gt;
      from osmosdr_swig import *
    File "/usr/local/lib/python2.7/dist-packages/osmosdr/osmosdr_swig.py", line 17, in &lt;module&gt;
      _osmosdr_swig = swig_import_helper()
    File "/usr/local/lib/python2.7/dist-packages/osmosdr/osmosdr_swig.py", line 16, in swig_import_helper
      return importlib.import_module('_osmosdr_swig')
    File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module
      __import__(name)
  ImportError: No module named _osmosdr_swig
  </code></pre>
  
  <p>And with osmosdr from apt-get:</p>
  
  <pre><code>linux; GNU C++ version 6.2.0 20161010; Boost_106100; UHD_003.009.005-0-unknown
  
  gr-osmosdr 0.1.4 (0.1.4) gnuradio 3.7.10
  built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf bladerf rfspace airspy soapy redpitaya 
  *** Error in `python': corrupted double-linked list: 0x01259bf0 ***
  Annullato
  </code></pre>
  
  <p>And with pybombs I can't install:</p>
  
  <pre><code>UnicodeDecodeError: 'utf8' codec can't decode byte 0xd8 in position 641: invalid continuation byte
  </code></pre>
  
  <p>What am I doing wrong?</p>