gnu: Add rust-signal-hook-registry-1.2.

* gnu/packages/crates-io.scm (rust-signal-hook-registry-1.2):
New variable.

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

gnu/packages/crates-io.scm

@@ -13714,6 +13714,32 @@ (define-public rust-signal-hook-0.1
     (description "Unix signal handling.")
     (license (list license:asl2.0 license:expat))))
 
+(define-public rust-signal-hook-registry-1.2
+  (package
+    (name "rust-signal-hook-registry")
+    (version "1.2.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "signal-hook-registry" version))
+       (file-name
+        (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0haz828bif1lbp3alx17zkcy5hwy15bbpmvks72j8iznx7npix4l"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs
+       (("rust-arc-swap" ,rust-arc-swap-0.4)
+        ("rust-libc" ,rust-libc-0.2))
+       #:cargo-development-inputs
+       (("rust-signal-hook" ,rust-signal-hook-0.1)
+        ("rust-version-sync" ,rust-version-sync-0.8))))
+    (home-page "https://github.com/vorner/signal-hook")
+    (synopsis "Backend crate for signal-hook")
+    (description "Backend crate for signal-hook.")
+    (license (list license:asl2.0 license:expat))))
+
 (define-public rust-signal-hook-registry-1.0
   (package
     (name "rust-signal-hook-registry")