Revert "adjust confdir patch for v0.35.1 rather than master"

This reverts commit 2c2216b8f4.

confdir.patch

@@ -1,13 +1,13 @@
 diff --git a/meson.build b/meson.build
-index acaa39f764..b4efc581dc 100644
+index 4aada48731..39a37853de 100644
 --- a/meson.build
 +++ b/meson.build
-@@ -1625,7 +1625,7 @@ sys.stdout.write(features)
+@@ -1655,7 +1655,7 @@ sys.stdout.write(features)
  '''
  feature_str = run_command(python, '-c', feature_sort, feature_keys, check: true).stdout()
  conf_data.set_quoted('FULLCONFIG', feature_str)
 -conf_data.set_quoted('MPV_CONFDIR', join_paths(get_option('prefix'), get_option('sysconfdir'), 'mpv'))
 +conf_data.set_quoted('MPV_CONFDIR', '/etc/mpv')
+ conf_data.set_quoted('PLATFORM', host_machine.system())
  configure_file(output : 'config.h', configuration : conf_data)
  message('List of enabled features: ' + feature_str)
-