meson: create dirs and touch /usr

This is the equivalent of $(INSTALL_DIRS) and install-touch-usr-hook.
I did not bother to create the directories into which we install files,
since they will be created anyway.

v2:
- remove bashism

src/core/meson.build

@@ -220,3 +220,17 @@ custom_target(
 install_data('system.conf',
              'user.conf',
              install_dir : pkgsysconfdir)
+
+meson.add_install_script('sh', '-c', mkdir_p.format(systemshutdowndir))
+meson.add_install_script('sh', '-c', mkdir_p.format(systemsleepdir))
+meson.add_install_script('sh', '-c', mkdir_p.format(systemgeneratordir))
+meson.add_install_script('sh', '-c', mkdir_p.format(usergeneratordir))
+
+meson.add_install_script('sh', '-c',
+                         mkdir_p.format(pkgsysconfdir + '/system/multi-user.target.wants'))
+meson.add_install_script('sh', '-c',
+                         mkdir_p.format(pkgsysconfdir + '/system/getty.target.wants'))
+meson.add_install_script('sh', '-c',
+                         mkdir_p.format(pkgsysconfdir + '/user'))
+meson.add_install_script('sh', '-c',
+                         mkdir_p.format(sysconfdir + '/xdg/systemd'))

src/kernel-install/meson.build

@@ -8,3 +8,6 @@ install_data('50-depmod.install',
              '90-loaderentry.install',
              install_mode : 'rwxr-xr-x',
              install_dir : kernelinstalldir)
+
+meson.add_install_script('sh', '-c',
+                         mkdir_p.format(sysconfdir + '/kernel/install.d'))

src/udev/meson.build

@@ -163,3 +163,6 @@ udev_pc = configure_file(
     configuration : substs)
 install_data(udev_pc,
              install_dir : pkgconfigdatadir)
+
+meson.add_install_script('sh', '-c',
+                         mkdir_p.format(sysconfdir + '/udev/rules.d'))