gnu: Add perl-regexp-pattern-license.

* gnu/packages/license.scm: New file.
* gnu/local.mk (GNU_SYSTEM_MODULES): Add this.

gnu/local.mk

@@ -249,6 +249,7 @@ GNU_SYSTEM_MODULES =				\
   %D%/packages/libffcall.scm			\
   %D%/packages/libffi.scm			\
   %D%/packages/libftdi.scm			\
+  %D%/packages/license.scm			\
   %D%/packages/calendar.scm			\
   %D%/packages/libidn.scm			\
   %D%/packages/libphidget.scm			\

gnu/packages/license.scm

@@ -0,0 +1,57 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages license)
+  #:use-module (guix licenses)
+  #:use-module (gnu packages)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system perl)
+  #:use-module (gnu packages perl)
+  #:use-module (gnu packages perl-check))
+
+;;;
+;;; Please: Try to add new module packages in alphabetic order.
+;;;
+
+(define-public perl-regexp-pattern-license
+  (package
+    (name "perl-regexp-pattern-license")
+    (version "3.1.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "mirror://cpan/authors/id/J/JO/JONASS/Regexp-Pattern-License-"
+             "v" version ".tar.gz"))
+       (sha256
+        (base32
+         "1479ismcgq1mx712yhw0qswb4z75spc81f9k621vfpkji0smpyk2"))))
+    (build-system perl-build-system)
+    (native-inputs
+     `(("perl-regexp-pattern" ,perl-regexp-pattern)
+       ("perl-test-exception" ,perl-test-exception)))
+    (propagated-inputs
+     `(("perl-strictures" ,perl-strictures-2)))
+    (home-page "http://search.cpan.org/dist/Regexp-Pattern-License/")
+    (synopsis "Regular expressions for legal licenses")
+    (description "Regexp::Pattern::License provides a hash of regular
+expression patterns related to legal software licenses.
+
+Regexp::Pattern is a convention for organizing reusable regex patterns.")
+    (license gpl3+)))