gnu: Add rust-bitflags-0.8.

* gnu/packages/crates-io.scm (rust-bitflags-0.8): New variable.

Signed-off-by: Efraim Flashner <efraim@flashner.co.il>

gnu/packages/crates-io.scm

@@ -935,6 +935,21 @@ (define-public rust-bitflags-1
     (license (list license:asl2.0
                    license:expat))))
 
+(define-public rust-bitflags-0.8
+  (package
+    (inherit rust-bitflags-1)
+    (name "rust-bitflags")
+    (version "0.8.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "bitflags" version))
+       (file-name
+        (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "1x5z8hmirpnapkx6sww8gkc6x0q8ppni0lbsigm3mrba5byfjw0k"))))))
+
 (define-public rust-blake2-rfc-0.2
   (package
     (name "rust-blake2-rfc")