gnu: Add rust-os-str-bytes-4.

* gnu/packages/crates-io.scm (rust-os-str-bytes-4): New variable.
(rust-os-str-bytes-2): Inherit from rust-os-str-bytes-4.

gnu/packages/crates-io.scm

@@ -39754,8 +39754,36 @@ under its new name.")
         ("rust-nix" ,rust-nix-0.8)
         ("rust-winapi" ,rust-winapi-0.2))))))
 
+(define-public rust-os-str-bytes-4
+  (package
+    (name "rust-os-str-bytes")
+    (version "4.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (crate-uri "os-str-bytes" version))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32 "16d70qzd2g18i28i6znjcpck0r9hjd5gz5qcr1cl2l9s6d1sknmd"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-memchr" ,rust-memchr-2)
+        ("rust-print-bytes" ,rust-print-bytes-0.4)
+        ("rust-uniquote" ,rust-uniquote-3))
+       #:cargo-development-inputs
+       (("rust-getrandom" ,rust-getrandom-0.2))))
+    (home-page "https://github.com/dylni/os_str_bytes")
+    (synopsis
+     "Traits for converting between byte sequences and platform-native strings")
+    (description
+     "This package provides a traits for converting between byte sequences and
+platform-native strings.")
+    (license (list license:expat license:asl2.0))))
+
 (define-public rust-os-str-bytes-2
   (package
+    (inherit rust-os-str-bytes-4)
     (name "rust-os-str-bytes")
     (version "2.4.0")
     (source
@@ -39767,16 +39795,7 @@ under its new name.")
        (sha256
         (base32
          "11agh8n3x2l4sr3sxvx6byc1j3ryb1g6flb1ywn0qhq7xv1y3cmg"))))
-    (build-system cargo-build-system)
+    (arguments `(#:skip-build? #t))))
-    (arguments `(#:skip-build? #t))
-    (home-page
-     "https://github.com/dylni/os_str_bytes")
-    (synopsis
-     "Traits for converting between byte sequences and platform-native strings")
-    (description
-     "This package provides a traits for converting between byte sequences and
-platform-native strings.")
-    (license (list license:expat license:asl2.0))))
 
 (define-public rust-ouroboros-macro-0.14
   (package