patches: Add matrix-synapse build failure patch

patches/338637.patch

@@ -0,0 +1,18 @@
+diff --git a/pkgs/development/python-modules/xmlschema/default.nix b/pkgs/development/python-modules/xmlschema/default.nix
+index 927296f072f7962..efb003146714648 100644
+--- a/pkgs/development/python-modules/xmlschema/default.nix
++++ b/pkgs/development/python-modules/xmlschema/default.nix
+@@ -35,10 +35,9 @@ buildPythonPackage rec {
+   ];
+ 
+   disabledTests = [
+-    # -file://///filer01/MY_HOME/dev/XMLSCHEMA/test.xsd
+-    # +file:////filer01/MY_HOME/dev/XMLSCHEMA/test.xsd
+-    "test_normalize_url_slashes"
+-    "test_normalize_url_with_base_unc_path"
++    # Incorrect error message in pickling test for Python 3.12 in Debian
++    # https://github.com/sissaschool/xmlschema/issues/412
++    "test_pickling_subclassed_schema__issue_263"
+   ];
+ 
+   pythonImportsCheck = [ "xmlschema" ];