add package install script, move runit rules to subdirectory

Makefile

@@ -1,9 +1,12 @@
 install:
-	install -m755 rc.local $(DESTDIR)/etc
-	install -m755 rc.shutdown $(DESTDIR)/etc
+	install -m755 runit/rc.local $(DESTDIR)/etc
+	install -m755 runit/rc.shutdown $(DESTDIR)/etc
 
 uninstall:
 	$(RM) $(DESTDIR)/etc/rc.local
 	$(RM) $(DESTDIR)/etc/rc.shutdown
 
-.PHONY: install uninstall
+install_packages:
+	./install_packages.sh
+
+.PHONY: install uninstall install_packages

install_packages.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+xbps-install -S tlp \
+    powertop \
+    cpupower