gnu: Add rust-cpp-demangle-0.3.

* gnu/packages/crates-io.scm (rust-cpp-demangle-0.3): New variable.

Change-Id: I252c7b83169ff73541de962a731e573a0252dff3

gnu/packages/crates-io.scm

@@ -15607,6 +15607,24 @@ Supports Linux through either JACK or ALSA.")
      "This package provides a crate for demangling C++ symbols.")
     (license (list license:expat license:asl2.0))))
 
+(define-public rust-cpp-demangle-0.3
+  (package
+    (inherit rust-cpp-demangle-0.4)
+    (name "rust-cpp-demangle")
+    (version "0.3.5")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "cpp_demangle" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "03vi33qz8x7lll0xd3acd3jp39nvzv174wg424qsb1nkm8z9bapf"))))
+    (arguments
+     `(#:cargo-inputs (("rust-afl" ,rust-afl-0.11)
+                       ("rust-cfg-if" ,rust-cfg-if-1))
+       #:cargo-development-inputs (("rust-clap" ,rust-clap-2)
+                                   ("rust-diff" ,rust-diff-0.1))))))
+
 (define-public rust-cpufeatures-0.2
   (package
     (name "rust-cpufeatures")