COMP: incorrect comment type in options files (scotchDecomp)

src/parallel/decompose/scotchDecomp/Make/options

-# Note including of mplib compilation rules. This
-# is purely to avoid scotch.h including mpicxx.h
-# which causes problems.
+/*
+ * Note including of mplib compilation rules.
+ * This is purely to avoid scotch.h including mpicxx.h, which causes problems.
+ */
 sinclude $(GENERAL_RULES)/mplib$(WM_MPLIB)
 sinclude $(RULES)/mplib$(WM_MPLIB)