Adding make to the allowed command list

Author: bsipocz

tox.ini

@@ -28,7 +28,7 @@ deps =
     # TODO: add pure python dependency, so we can add an example for the github install
     devdeps: git+https://github.com/astropy/pyvo.git#egg=pyvo
 
-allowlist_externals = bash, sed
+allowlist_externals = bash, sed, make
 
 commands =
     pip freeze