Add missing clean-str-dups script

Signed-off-by: Knut Ahlers <knut@ahlers.me>

bin/clean-str-dups.py

@@ -0,0 +1,24 @@
+#!/usr/bin/env python
+
+import os
+import sys
+
+
+def main(args):
+    sep = args[1]
+    in_str = args[2]
+    out = []
+
+    [
+        out.append(i)
+        for i in in_str.split(sep)
+        if not out.count(i)
+    ]
+
+    print(sep.join(out))
+
+    return 0
+
+
+if __name__ == '__main__':
+    sys.exit(main(sys.argv))