gnu: Add rust-openssl-macros-0.1.

* gnu/packages/crates-io.scm (rust-openssl-macros-0.1): New variable.

gnu/packages/crates-io.scm

@@ -40268,6 +40268,30 @@ the system.")
 the default program configured on the system.")
     (license (list license:expat license:asl2.0))))
 
+(define-public rust-openssl-macros-0.1
+  (package
+    (name "rust-openssl-macros")
+    (version "0.1.0")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "openssl-macros" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "0v3kgnzbadrf9c06q4cqmbjas53av73n5w7wwz3n0nb6257y80dm"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-proc-macro2" ,rust-proc-macro2-1)
+        ("rust-quote" ,rust-quote-1)
+        ("rust-syn" ,rust-syn-1))))
+    (home-page "https://github.com/sfackler/rust-openssl")
+    (synopsis "Internal macros used by the openssl crate.")
+    (description "This package provides internal macros used by the openssl
+crate.")
+    (license (list license:expat license:asl2.0))))
+
 (define-public rust-openssl-0.10
   (package
     (name "rust-openssl")