meson: add target to update the chromiumos rules

There is no change in the file right now, but the download seems to work
OK.

It's funny that the biggest company in the world cannot provide a
download link in plain text.

hwdb.d/meson.build

@@ -47,3 +47,7 @@ endif
 run_target(
         'hwdb-update',
         command : [hwdb_update_sh, meson.current_source_dir()])
+
+run_target(
+        'autosuspend-update',
+        command : [autosuspend_update_sh, project_source_root + '/tools/chromiumos'])

meson.build

@@ -2930,6 +2930,7 @@ make_directive_index_py = find_program('tools/make-directive-index.py')
 make_man_index_py = find_program('tools/make-man-index.py')
 xml_helper_py = find_program('tools/xml_helper.py')
 hwdb_update_sh = find_program('tools/meson-hwdb-update.sh')
+autosuspend_update_sh = find_program('tools/meson-autosuspend-update.sh')
 
 subdir('sysctl.d')
 subdir('sysusers.d')

tools/meson-autosuspend-update.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+set -eu
+
+cd "$1"
+
+(curl -L 'https://chromium.googlesource.com/chromiumos/platform2/+/master/power_manager/udev/gen_autosuspend_rules.py?format=TEXT'; echo) \
+    | base64 -d > gen_autosuspend_rules.py