Add metadata for Nanos6

pkgs/nanos6/default.nix

@@ -105,4 +105,12 @@ in
       mkdir -p $out/nix-support
       echo "export NANOS6_HOME=$out" >> $out/nix-support/setup-hook
     ''; 
+
+    meta = with lib; {
+      homepage = "https://github.com/bsc-pm/nanos6";
+      description = "Nanos6 runtime for OmpSs-2" +
+        optionalString (enableDebug) " (with debug symbols)";
+      platforms = platforms.linux;
+      license = licenses.gpl3;
+    };
   }

pkgs/nanos6/jemalloc.nix

@@ -6,4 +6,7 @@ jemalloc.overrideAttrs (old: {
     "--enable-stats"
   ];
   hardeningDisable = [ "all" ];
+  meta = old.meta // {
+    description = old.meta.description + " (for Nanos6)";
+  };
 })