gnu: Rename (gnu packages ocrad) to (gnu packages ocr).

* gnu/packages/ocrad.scm: Deleted.
* gnu/packages/ocr.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Change ocrad.scm to ocr.scm.

gnu-system.am

@@ -221,7 +221,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/nutrition.scm			\
   gnu/packages/nvi.scm				\
   gnu/packages/ocaml.scm			\
-  gnu/packages/ocrad.scm			\
+  gnu/packages/ocr.scm				\
   gnu/packages/onc-rpc.scm			\
   gnu/packages/openbox.scm			\
   gnu/packages/openldap.scm			\

gnu/packages/ocr.scm

@@ -16,7 +16,7 @@
 ;;; 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 ocrad)
+(define-module (gnu packages ocr)
   #:use-module (guix licenses)
   #:use-module (guix packages)
   #:use-module (guix download)