gnu: grep: Update to 2.22.

* gnu/packages/base.scm (grep): Upgrade to 2.22.  Remove
  'grep-CVE-2015-1345.patch'.
* gnu/packages/patches/grep-CVE-2015-1345.patch: Remove.
* gnu-system.am (dist_patch_DATA): Adjust accordingly.

gnu-system.am

@@ -482,7 +482,6 @@ dist_patch_DATA =						\
   gnu/packages/patches/gobject-introspection-absolute-shlib-path.patch \
   gnu/packages/patches/gobject-introspection-cc.patch		\
   gnu/packages/patches/gobject-introspection-girepository.patch	\
-  gnu/packages/patches/grep-CVE-2015-1345.patch			\
   gnu/packages/patches/grub-gets-undeclared.patch		\
   gnu/packages/patches/grub-freetype.patch			\
   gnu/packages/patches/gsl-poly-test-fix-pt1.patch		\

gnu/packages/base.scm

@@ -73,15 +73,14 @@ command-line arguments, multiple languages, and so on.")
 (define-public grep
   (package
    (name "grep")
-   (version "2.21")
+   (version "2.22")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnu/grep/grep-"
                                 version ".tar.xz"))
             (sha256
              (base32
-              "1pp5n15qwxrw1pibwjhhgsibyv5cafhamf8lwzjygs6y00fa2i2j"))
+              "1srn321x7whlhs5ks36zlcrrmj4iahll8fxwsh1vbz3v04px54fa"))))
-            (patches (list (search-patch "grep-CVE-2015-1345.patch")))))
    (build-system gnu-build-system)
    (synopsis "Print lines matching a pattern")
    (description

gnu/packages/patches/grep-CVE-2015-1345.patch

@@ -1,17 +0,0 @@
-Fix CVE-2015-1345.  From upstream commit
-83a95bd8c8561875b948cadd417c653dbe7ef2e2
-by Yuliy Pisetsky <ypisetsky@fb.com>.
-
-diff --git a/src/kwset.c b/src/kwset.c
-index 4003c8d..376f7c3 100644
---- a/src/kwset.c
-+++ b/src/kwset.c
-@@ -643,6 +643,8 @@ bmexec_trans (kwset_t kwset, char const *text, size_t size)
-                     if (! tp)
-                       return -1;
-                     tp++;
-+                    if (ep <= tp)
-+                      break;
-                   }
-               }
-           }