fix findPythonDeps when called with an absolute path to an EC

`eb --missing` returns a list with filenames. So an absolute path passed
to `--ec` isn't matched which leads to an error stating you should
install the EasyConfig that you are trying to find the dependencies of.
Fix by getting the filename/basename first.

Author: Flamefire

easybuild/scripts/findPythonDeps.py

@@ -171,8 +171,9 @@ def print_deps(package, verbose):
                               capture_stderr=False,
                               action_desc='Get missing dependencies'
                               )
+    excluded_dep = '(%s)' % os.path.basename(args.ec)
     missing_deps = [dep for dep in missing_dep_out.split('\n')
-                    if dep.startswith('*') and '(%s)' % args.ec not in dep
+                    if dep.startswith('*') and excluded_dep not in dep
                     ]
     if missing_deps:
         print('You need to install all modules on which %s depends first!' % args.ec)