meson: reindent all files with 8 spaces

The indentation for emacs'es meson-mode is added .dir-locals.

All files are reindented automatically, using the lasest meson-mode from git.
Indentation should now be fairly consistent.

sysctl.d/meson.build

@@ -1,22 +1,20 @@
-# -*- mode: meson -*-
-
 install_data(
-  '50-default.conf',
-  install_dir : sysctldir)
+        '50-default.conf',
+        install_dir : sysctldir)
 
 in_files = []
 
 if conf.get('ENABLE_COREDUMP', 0) == 1
-  in_files += ['50-coredump.conf']
+        in_files += ['50-coredump.conf']
 endif
 
 foreach file : in_files
-  gen = configure_file(
-      input : file + '.in',
-      output : file,
-      configuration : substs)
-  install_data(gen,
-               install_dir : sysctldir)
+        gen = configure_file(
+                input : file + '.in',
+                output : file,
+                configuration : substs)
+        install_data(gen,
+                     install_dir : sysctldir)
 endforeach
 
 meson.add_install_script('sh', '-c',