gnu: Add go-github-com-templexxx-xor.

* gnu/packages/syncthing.scm (go-github-com-templexxx-xor): New variable.

gnu/packages/syncthing.scm

@@ -1295,6 +1295,30 @@ rolling hash.")
       (home-page "https://github.com/chmduquesne/rollinghash")
       (license expat))))
 
+(define-public go-github-com-templexxx-xor
+  (let ((commit "42f9c041c330b560afb991153bf183c25444bcdc")
+        (revision "0"))
+    (package
+      (name "go-github-com-templexxx-xor")
+      (version (git-version "0.0.0" revision commit))
+      (source
+        (origin
+          (method git-fetch)
+          (uri (git-reference
+                 (url "https://github.com/templexxx/xor.git")
+                 (commit commit)))
+          (file-name (git-file-name name version))
+          (sha256
+           (base32
+            "0ixzk64nyyzas4lyqxdih824xg5f5vph18vyiibmnflwd61m0i78"))))
+      (build-system go-build-system)
+      (arguments
+       '(#:import-path "github.com/templexxx/xor"))
+      (synopsis "XOR in Go")
+      (description "This packages provides a Go implementation of XOR.")
+      (home-page "https://github.com/templexxx/xor")
+      (license expat))))
+
 (define-public go-github-com-petermattis-goid
   (let ((commit "3db12ebb2a599ba4a96bea1c17b61c2f78a40e02")
         (revision "0"))