gnu: gnutls: Add 3.7.7.

* gnu/packages/tls.scm (gnutls-latest): New variable.

gnu/packages/tls.scm

@@ -329,6 +329,23 @@ (define-public gnutls
     (properties '((ftp-server . "ftp.gnutls.org")
                   (ftp-directory . "/gcrypt/gnutls")))))
 
+(define-public gnutls-latest
+  ;; Version 3.7.7 introduces 'set-session-record-port-close!', which allows
+  ;; us to get rid of the wrapper port in 'tls-wrap'.
+  (package
+    (inherit gnutls)
+    (version "3.7.7")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "mirror://gnupg/gnutls/v"
+                                  (version-major+minor version)
+                                  "/gnutls-" version ".tar.xz"))
+              (patches (search-patches "gnutls-skip-trust-store-test.patch"
+                                       "gnutls-cross.patch"))
+              (sha256
+               (base32
+                "01i1gl15k6qwvxmxx0by1mn9nlmcmym18wdpm7dn9awfsp8474dy"))))))
+
 (define-public gnutls/guile-2.0
   ;; GnuTLS for Guile 2.0.
   (package/inherit gnutls