gnu: go-gopkg-in-tomb-v1: Move to golang-xyz.

* gnu/packages/golang.scm (go-gopkg-in-tomb-v1): Move from here ...
* gnu/packages/golang-xyz.scm: ... to here.

Change-Id: I9b5e36505b924c2ae69b95201c2d81312ae16310

gnu/packages/golang.scm

@@ -1618,37 +1618,6 @@ management interface.  It can be used to monitor and control an OpenVPN process
 running with its management port enabled.")
       (license license:expat))))
 
-(define-public go-gopkg-in-tomb-v1
-  (package
-    (name "go-gopkg-in-tomb-v1")
-    (version "1.0.0-20141024135613-dd632973f1e7")
-    (source (origin
-              (method git-fetch)
-              (uri (git-reference
-                    (url "https://gopkg.in/tomb.v1")
-                    (commit (go-version->git-ref version))))
-              (file-name (git-file-name name version))
-              (sha256
-               (base32
-                "1lqmq1ag7s4b3gc3ddvr792c5xb5k6sfn0cchr3i2s7f1c231zjv"))))
-    (build-system go-build-system)
-    (arguments
-     (list #:import-path "gopkg.in/tomb.v1"
-           #:phases
-           #~(modify-phases %standard-phases
-               (add-after 'unpack 'fix-test
-                 (lambda* (#:key import-path #:allow-other-keys)
-                   (substitute* (string-append "src/" import-path
-                                               "/tomb_test.go")
-                     (("t.Fatalf\\(`Killf\\(\"BO%s")
-                      "t.Fatalf(`Killf(\"BO%%s")))))))
-    (home-page "https://gopkg.in/tomb.v1")
-    (synopsis "@code{tomb} handles clean goroutine tracking and termination")
-    (description
-     "The @code{tomb} package handles clean goroutine tracking and
-termination.")
-    (license license:bsd-3)))
-
 (define-public go-github-com-google-cadvisor
   (let ((commit "2ed7198f77395ee9a172878a0a7ab92ab59a2cfd")
         (revision "0"))