chicken: 5.1.0 -> 5.2.0

Also updates the matchable egg (used by egg2nix) from 1.0 -> 1.1 and
removes trailing slashes from the path prefix variables passed to
wrapProgram (they're unnecessary and only result in doubled-up slashes
in the values).

pkgs/development/compilers/chicken/5/chicken.nix

@@ -1,7 +1,7 @@
 { stdenv, fetchurl, makeWrapper, bootstrap-chicken ? null }:
 
 let
-  version = "5.1.0";
+  version = "5.2.0";
   platform = with stdenv;
     if isDarwin then "macosx"
     else if isCygwin then "cygwin"
@@ -18,7 +18,7 @@ stdenv.mkDerivation {
 
   src = fetchurl {
     url = "https://code.call-cc.org/releases/${version}/chicken-${version}.tar.gz";
-    sha256 = "0jsbp3kp0134f318j3wpd1n85gf8qzh034fn198gvazsv2l024aw";
+    sha256 = "1yl0hxm9cirgcp8jgxp6vv29lpswfvaw3zfkh6rsj0vkrv44k4c1";
   };
 
   setupHook = lib.ifEnable (bootstrap-chicken != null) ./setup-hook.sh;