Update paraver to 4.12.0

Adds a new patch to fix libxml2: the m4 AM_PATH_XML2 macro has been
deprecated and is no longer included in the latest nixpkgs unstable.
Upstream recommends using `PKG_CHECK_MODULES` instead.

pkgs/paraver/default.nix

@@ -1,5 +1,6 @@
 {
   stdenv
+, fetchFromGitHub
 , autoreconfHook
 , boost
 , libxml2
@@ -18,12 +19,13 @@ let
 in
 stdenv.mkDerivation rec {
   pname = "wxparaver";
-  version = "4.11.2";
+  version = "4.12.0";
 
-  src = builtins.fetchGit {
-    url = "https://github.com/bsc-performance-tools/wxparaver.git";
-    rev = "129e6b4a4f061e5a319049db8db1620f5de3bd70"; # v4.11.2 (missing tag)
-    ref = "master";
+  src = fetchFromGitHub {
+    owner = "bsc-performance-tools";
+    repo = "wxparaver";
+    rev = "v${version}";
+    sha256 = "sha256-YsO5gsuEFQdki3lQudEqgo5WXOt/fPdvNw5OxZQ86Zo=";
   };
 
   hardeningDisable = [ "all" ];