gnu: go-github-com-jpillora-backoff: Move to golang-xyz.

* gnu/packages/golang.scm (go-github-com-jpillora-backoff): Move
from here ...
* gnu/packages/golang-xyz.scm: ... to here.

Change-Id: I3e5a6018118bf2717ad5d364579e2c960da68415

gnu/packages/golang-xyz.scm

@@ -2765,6 +2765,32 @@ storing only one copy of each unique string in memory.  All functions may be
 called concurrently with themselves and each other.")
     (license license:expat)))
 
+(define-public go-github-com-jpillora-backoff
+  (let ((commit
+         "06c7a16c845dc8e0bf575fafeeca0f5462f5eb4d")
+        (revision "0"))
+    (package
+      (name "go-github-com-jpillora-backoff")
+      (version (git-version "0.0.0" revision commit))
+      (source
+       (origin
+         (method git-fetch)
+         (uri (git-reference
+               (url "https://github.com/jpillora/backoff")
+               (commit commit)))
+         (file-name (git-file-name name version))
+         (sha256
+          (base32 "0xhvxr7bm47czdc5hy3kl508z3y4j91i2jm7vg774i52zych6k4l"))))
+      (build-system go-build-system)
+      (arguments
+       (list
+        #:import-path "github.com/jpillora/backoff"))
+      (home-page "https://github.com/jpillora/backoff")
+      (synopsis "Simple exponential backoff counter in Go")
+      (description
+       "This package is a simple exponential backoff counter in Go.")
+      (license license:expat))))
+
 (define-public go-github-com-k0kubun-go-ansi
   (package
     (name "go-github-com-k0kubun-go-ansi")

gnu/packages/golang.scm

@@ -3263,32 +3263,6 @@ developed by the Go team.  It provides IDE features to any LSP-compatible
 editor.")
     (license license:bsd-3)))
 
-(define-public go-github-com-jpillora-backoff
-  (let ((commit
-         "06c7a16c845dc8e0bf575fafeeca0f5462f5eb4d")
-        (revision "0"))
-    (package
-      (name "go-github-com-jpillora-backoff")
-      (version (git-version "0.0.0" revision commit))
-      (source
-       (origin
-         (method git-fetch)
-         (uri (git-reference
-               (url "https://github.com/jpillora/backoff")
-               (commit commit)))
-         (file-name (git-file-name name version))
-         (sha256
-          (base32
-           "0xhvxr7bm47czdc5hy3kl508z3y4j91i2jm7vg774i52zych6k4l"))))
-      (build-system go-build-system)
-      (arguments
-       '(#:import-path "github.com/jpillora/backoff"))
-      (home-page "https://github.com/jpillora/backoff")
-      (synopsis "Simple exponential backoff counter in Go")
-      (description "This package is a simple exponential backoff counter in
-Go.")
-      (license license:expat))))
-
 (define-public go-github-com-stretchr-objx
   (package
     (name "go-github-com-stretchr-objx")