gnu: tar: Update to 1.17.

* gnu/packages/base.scm (tar): Update to 1.17.  Remove 'arguments' and
  'inputs'.
* gnu/packages/patches/tar-gets-undeclared.patch: Remove.
* gnu-system.am (dist_patch_DATA): Remove 'tar-gets-undeclared.patch'.

gnu-system.am

@@ -239,7 +239,6 @@ dist_patch_DATA =						\
   gnu/packages/patches/readline-link-ncurses.patch		\
   gnu/packages/patches/ripperx-libm.patch			\
   gnu/packages/patches/scheme48-tests.patch			\
-  gnu/packages/patches/tar-gets-undeclared.patch		\
   gnu/packages/patches/tcsh-fix-autotest.patch			\
   gnu/packages/patches/teckit-cstdio.patch			\
   gnu/packages/patches/valgrind-glibc.patch			\

gnu/packages/base.scm

@@ -130,18 +130,15 @@ is often used for substituting text patterns in a stream.")
 (define-public tar
   (package
    (name "tar")
-   (version "1.26")
+   (version "1.27")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnu/tar/tar-"
                                 version ".tar.bz2"))
             (sha256
              (base32
-              "0hbdkzmchq9ycr2x1pxqdcgdbaxksh8c6ac0jf75jajhcks6jlss"))))
+              "0yrwmx2f721ahpnki4fnzvnmrd3md3bq417icb4wrjky7k3caf12"))))
    (build-system gnu-build-system)
-   (inputs `(("patch/gets" ,(search-patch "tar-gets-undeclared.patch"))))
-   (arguments
-    `(#:patches (list (assoc-ref %build-inputs "patch/gets"))))
    (synopsis "Managing tar archives")
    (description
     "Tar provides the ability to create tar archives, as well as the

gnu/packages/patches/tar-gets-undeclared.patch

@@ -1,26 +0,0 @@
-This patch is needed to allow builds with newer versions of
-the GNU libc (2.16+).
-
-This is a backport of this patch:
-
-commit 66712c23388e93e5c518ebc8515140fa0c807348
-Author: Eric Blake <eblake@redhat.com>
-Date:   Thu Mar 29 13:30:41 2012 -0600
-
-    stdio: don't assume gets any more
-    
---- tar-1.26/gnu/stdio.in.h	2012-07-02 14:28:45.000000000 +0200
-+++ tar-1.26/gnu/stdio.in.h	2012-07-02 14:28:50.000000000 +0200
-@@ -160,12 +160,6 @@ _GL_WARN_ON_USE (fflush, "fflush is not
-                  "use gnulib module fflush for portable POSIX compliance");
- #endif
- 
--/* It is very rare that the developer ever has full control of stdin,
--   so any use of gets warrants an unconditional warning.  Assume it is
--   always declared, since it is required by C89.  */
--#undef gets
--_GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");
--
- #if @GNULIB_FOPEN@
- # if @REPLACE_FOPEN@
- #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)