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.
Reviewed-by: Rodrigo Arias Mallo <rodrigo.arias@bsc.es>
Needed to fix the error on NixOS:
GLib-GIO-ERROR **: No GSettings schemas are installed on the system
See https://github.com/NixOS/nixpkgs/issues/16285
Reviewed-by: Rodrigo Arias Mallo <rodrigo.arias@bsc.es>
Tested-by: Rodrigo Arias Mallo <rodrigo.arias@bsc.es>
