gnu: Add perl-sys-sigaction.

* gnu/packages/perl.scm (perl-sys-sigaction): New variable.

gnu/packages/perl.scm

@@ -692,6 +692,25 @@ signal running perl code from another thread, asynchronously, and
 sometimes even without using a single syscall.")
     (license (package-license perl))))
 
+(define-public perl-sys-sigaction
+  (package
+    (name "perl-sys-sigaction")
+    (version "0.23")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "mirror://cpan/authors/id/L/LB/LBAXTER/Sys-SigAction-" version
+             ".tar.gz"))
+       (sha256
+        (base32 "0lykjlq5dsf7z927lpllzixd953izi3w7bg2pgy32h2k8n9nrvy4"))))
+    (build-system perl-build-system)
+    (home-page "https://metacpan.org/release/Sys-SigAction")
+    (synopsis "Consistent signal handling")
+    (description "This package provides a way for perl programs to handle
+signals.")
+    (license (package-license perl))))
+
 (define-public perl-attribute-util
   (package
     (name "perl-attribute-util")