aspectj: 1.5.2 -> 1.9.6

As discussed on the mailing list, the url is now pointed at the github
project release because the previous eclipse archive link was not kept
up-to-date anymore.

Relevant links:
- https://www.eclipse.org/lists/aspectj-dev/msg03311.html

pkgs/development/compilers/aspectj/default.nix

@@ -1,12 +1,15 @@
 {stdenv, fetchurl, jre}:
 
 stdenv.mkDerivation rec {
-  name = "aspectj-1.5.2";
+  pname = "aspectj";
+  version = "1.9.6";
   builder = ./builder.sh;
 
-  src = fetchurl {
-    url = "http://archive.eclipse.org/tools/aspectj/${name}.jar";
-    sha256 = "1b3mx248dc1xka1vgsl0jj4sm0nfjsqdcj9r9036mvixj1zj3nmh";
+  src = let
+    versionSnakeCase = builtins.replaceStrings ["."] ["_"] version;
+  in fetchurl {
+    url = "https://github.com/eclipse/org.aspectj/releases/download/V${versionSnakeCase}/aspectj-${version}.jar";
+    sha256 = "02jh66l3vw57k9a4dxlga3qh3487r36gyi6k2z2mmqxbpqajslja";
   };
 
   inherit jre;