gnu: Add rust-asn1-rs-impl-0.1.

* gnu/packages/crates-io.scm (rust-asn1-rs-impl-0.1): New variable.

gnu/packages/crates-io.scm

@@ -4250,6 +4250,29 @@ (define-public rust-asn1-0.13
      "This is a Rust library for parsing and generating ASN.1 data (DER only).")
     (license license:bsd-3)))
 
+(define-public rust-asn1-rs-impl-0.1
+  (package
+    (name "rust-asn1-rs-impl")
+    (version "0.1.0")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "asn1-rs-impl" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "1va27bn7qxqp4wanzjlkagnynv6jnrhnwmcky2ahzb1r405p6xr7"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-proc-macro2" ,rust-proc-macro2-1)
+        ("rust-quote" ,rust-quote-1)
+        ("rust-syn" ,rust-syn-1))))
+    (home-page "https://github.com/rusticata/asn1-rs")
+    (synopsis "Implementation details for the `asn1-rs` crate")
+    (description
+     "This package provides implementation details for the @code{asn1-rs} crate.")
+    (license (list license:expat license:asl2.0))))
+
 (define-public rust-as-slice-0.2
   (package
     (name "rust-as-slice")