Added note about error (home-assistant#4559)

DubhAd · frenck · commit 34c5baefa306 · 2018-02-08T21:48:06.000+01:00
Adding a specific note about the error that indicates the library is missing
diff --git a/source/_docs/z-wave/installation.markdown b/source/_docs/z-wave/installation.markdown
@@ -232,3 +232,11 @@ sudo chmod g+rw /dev/ttyAMA0
 ### {% linkable_title Device path changes %}
 
 If your device path changes when you restart, see [this guide](http://hintshop.ludvig.co.nz/show/persistent-names-usb-serial-devices/) on fixing it.
+
+### {% Unable to install python_openzwave %}
+
+If you're getting errors like:
+
+    openzwave-embed/open-zwave-master/libopenzwave.a: No such file or directory
+
+Then the problem is that you're missing `libudev-dev`, please [install it](/docs/z-wave/installation/#linux-except-hassio).
