libsigsegv: 2.11 -> 2.12

pkgs/development/libraries/libsigsegv/default.nix

···
 }:
 
 stdenv.mkDerivation rec {
-  name = "libsigsegv-2.11";
+  name = "libsigsegv-2.12";
 
   src = fetchurl {
     url = "mirror://gnu/libsigsegv/${name}.tar.gz";
-    sha256 = "063swdvq7mbmc1clv0rnh20grwln1zfc2qnm0sa1hivcxyr2wz6x";
+    sha256 = "1dlhqf4igzpqayms25lkhycjq1ccavisx8cnb3y4zapbkqsszq9s";
   };
 
   patches = if enableSigbusFix then [ ./sigbus_fix.patch ] else null;