gnu: Add rust-tiff-0.8.

* gnu/packages/crates-graphics.scm (rust-tiff-0.8): New variable.
(rust-tiff-0.6): Inherit from rust-tiff-0.8.

gnu/packages/crates-graphics.scm

@@ -2256,8 +2256,34 @@ first-class Rust objects.")
 applications.")
     (license license:expat)))
 
+(define-public rust-tiff-0.8
+  (package
+    (name "rust-tiff")
+    (version "0.8.1")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "tiff" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32 "0wg4a6w8sakyy0mggblg340mx8bgglx9hwsxsn8g5fpjkx7k6jbl"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:tests? #f              ; Not all files included
+       #:cargo-inputs
+       (("rust-flate2" ,rust-flate2-1)
+        ("rust-jpeg-decoder" ,rust-jpeg-decoder-0.3)
+        ("rust-weezl" ,rust-weezl-0.1))
+       #:cargo-development-inputs
+       (("rust-criterion" ,rust-criterion-0.3))))
+    (home-page "https://github.com/image-rs/image-tiff")
+    (synopsis "TIFF decoding and encoding library in pure Rust")
+    (description
+     "This package provides TIFF decoding and encoding library in pure Rust.")
+    (license license:expat)))
+
 (define-public rust-tiff-0.6
   (package
+    (inherit rust-tiff-0.8)
     (name "rust-tiff")
     (version "0.6.1")
     (source
@@ -2267,18 +2293,12 @@ applications.")
        (file-name (string-append name "-" version ".tar.gz"))
        (sha256
         (base32 "0ds48vs919ccxa3fv1www7788pzkvpg434ilqkq7sjb5dmqg8lws"))))
-    (build-system cargo-build-system)
     (arguments
      `(#:skip-build? #t
        #:cargo-inputs
        (("rust-jpeg-decoder" ,rust-jpeg-decoder-0.1)
         ("rust-miniz-oxide" ,rust-miniz-oxide-0.4)
-        ("rust-weezl" ,rust-weezl-0.1))))
+        ("rust-weezl" ,rust-weezl-0.1))))))
-    (home-page "https://github.com/image-rs/image-tiff")
-    (synopsis "TIFF decoding and encoding library in pure Rust")
-    (description
-     "This package provides TIFF decoding and encoding library in pure Rust.")
-    (license license:expat)))
 
 (define-public rust-tiff-0.5
   (package