udev rules: Use `uaccess' tag instead of `plugdev' group

Not all systems have a `plugdev' group.  The `uaccess' tag, however,
seems to be the standard these days  (seems to exist for about a de-
cade on major distros). We rename the file to have a higher priority
by default. At least on ArchLinux, it has to precede `73-seat-late'.

Tested on ArchLinux (local session) and Raspbian (remote session).

Change-Id: Iadcc74b32b92660fbf86b235e65692369535f7a6
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.sourcearcade.org/c/flashprog/+/266
diff --git a/util/meson.build b/util/meson.build
index bc89973..0e6cd78 100644
--- a/util/meson.build
+++ b/util/meson.build
@@ -2,7 +2,7 @@
   udev = dependency('udev')
 
   install_data([
-      'z60_flashprog.rules'
+      '50-flashprog.rules'
     ],
     install_dir : join_paths(udev.get_variable(pkgconfig : 'udevdir'), 'rules.d')
   )