pseq: Add service file

Add service file for power control and power sequence monitoring
combined application. Change meson build files to support.

Signed-off-by: Jim Wright <jlwright@us.ibm.com>
Change-Id: I0c06b0b66c7d02145516564dc98123a4633498b3
diff --git a/phosphor-power-sequencer/meson.build b/phosphor-power-sequencer/meson.build
index 19218ec..4f5bcf9 100644
--- a/phosphor-power-sequencer/meson.build
+++ b/phosphor-power-sequencer/meson.build
@@ -1,2 +1,6 @@
+install_subdir('config_files',
+    strip_directory: true,
+    install_dir: get_option('datadir')/'phosphor-power-sequencer')
+
 subdir('src')