gnu: Add rust-cpp-demangle-0.2.

* gnu/packages/crates-io.scm (rust-cpp-demangle-0.2): New variable.

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

gnu/packages/crates-io.scm

@@ -1051,6 +1051,35 @@ (define-public rust-defmac-0.1
          (base32
           "17giv0n0n1r64z0dahfvkjy3ys517jxyhs8sd9lmgvcljpjyryxa"))))))
 
+(define-public rust-cpp-demangle-0.2
+  (package
+    (name "rust-cpp-demangle")
+    (version "0.2.12")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "cpp_demangle" version))
+       (file-name
+        (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0a4hqsfc0sfdwy7pcr0rc1fjp2j47fxbkqfc2lfrbi4zlm5hq36k"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-afl" ,rust-afl-0.4)
+        ("rust-cfg-if" ,rust-cfg-if-0.1))
+       #:cargo-development-inputs
+       (("rust-clap" ,rust-clap-2)
+        ("rust-diff" ,rust-diff-0.1)
+        ("rust-glob" ,rust-glob-0.3))))
+    (home-page "https://github.com/gimli-rs/cpp_demangle")
+    (synopsis "Demangle C++ symbols")
+    (description
+     "This package provides a crate for demangling C++ symbols.")
+    (license (list license:expat license:asl2.0))))
+
 (define-public rust-demo-hack-0.0
   (package
     (name "rust-demo-hack")