glib2-devel split from glib2

Hi, Thanks to Fabian, as of 2.80.3-1, the development utilities requiring additional dependencies (*python*, *python-packaging*, *libelf*) have been split from *glib2* into *glib2-devel* with proper depends. You may need to add *glib2-devel* to the makedepends of your packages to get them to build again. At the same time, consider removing *python* or *python-packaging* from the makedepends if they were only added to run gdbus-codegen, glib-genmarshal or glib-mkenums. Greetings, Jan