gnu: Add go-github-com-pkg-xattr.

* gnu/packages/golang.scm (go-github-com-pkg-xattr): New variable.

Signed-off-by: Leo Famulari <leo@famulari.name>

gnu/packages/golang.scm

@@ -1406,6 +1406,36 @@ (define-public go-github-com-kortschak-utter
 aid data snapshotting.")
     (license license:isc)))
 
+(define-public go-github-com-pkg-xattr
+  (package
+    (name "go-github-com-pkg-xattr")
+    (version "0.4.9")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/pkg/xattr")
+                    (commit (string-append "v" version))))
+              (file-name (git-file-name name version))
+              (sha256
+               (base32
+                "0qg4zh0d8m4adaiicsd0cpw0w6g8sk01f4jz7jyxgirh1wfcsqyz"))))
+    (build-system go-build-system)
+    (arguments
+     '(#:import-path "github.com/pkg/xattr"))
+    (native-inputs (list go-golang-org-x-sys))
+    (home-page "https://github.com/pkg/xattr")
+    (synopsis "Support for extended file system attributes")
+    (description
+     "Package xattr provides support for extended attributes on Linux, Darwin and
+FreeBSD.  Extended attributes are name:value pairs permanently associated with
+files or directories.  They are similar to the environment strings associated with
+a process.  An attribute may be defined or undefined.  If defined, its value may
+be empty or non-empty.  You can find more details here:
+@@url{https://en.wikipedia.org/wiki/Extended_file_attributes,
+https://en.wikipedia.org/wiki/Extended_file_attributes}
+.")
+    (license license:bsd-2)))
+
 (define-public go-github-com-shadowsocks-go-shadowsocks2
   (package
     (name "go-github-com-shadowsocks-go-shadowsocks2")