Add bsd-credit Rule

Reference: #3571

Signed-off-by: Ayan Sinha Mahapatra <ayansmahapatra@gmail.com>

Author: AyanSinhaMahapatra

src/licensedcode/data/rules/bsd-credit_1.RULE

@@ -0,0 +1,13 @@
+---
+license_expression: bsd-credit
+is_license_notice: yes
+relevance: 80
+---
+
+Permission to use, copy, modify, and distribute this software for any purpose
+with or without fee is hereby granted, provided that the above copyright notice
+and this permission notice appear in all copies.
+
+Modification and redistribution in source and binary forms is permitted provided
+that {{due credit is given to the author and the OpenBSD project}} (for instance by
+leaving this copyright notice intact).