fix the path to clean

runtime.d/public_modules.rtinstall

@@ -2,7 +2,7 @@
 
 VERSION=${2#python}
 if which python >/dev/null 2>&1 && which pycompile >/dev/null 2>&1; then
-    pycompile -V $VERSION /usr/lib/$VERSION/
+    pycompile -V $VERSION /usr/lib/python$VERSION/
 else
     echo >&2 "python or pycompile not found in $(basename $0) hook."
     exit 1