allow running the script without the target in the current directory

fix-rpaths.py

@@ -1,11 +1,11 @@
 import subprocess
 import sys
-from os.path import join
+from os.path import join, basename
 import os
 
 app_bundle = sys.argv[1]
 
-app_binary = join(app_bundle, 'Contents/MacOS', app_bundle.split(".")[0])
+app_binary = join(app_bundle, 'Contents/MacOS', basename(app_bundle).split(".")[0])
 app_frameworks = join(app_bundle, 'Contents/Frameworks')
 
 binaries = [app_binary] + [join(app_frameworks, library) for library in os.listdir(app_frameworks)]