Boot the system via launch_daemon.

* This is actually working already, although we cannot reproduce all
  the features of the former Bootscript yet. This is without any
  dependency support in launch_daemon.
* All shell activity like cleaning out /tmp, setting up the environment,
  setting the time, etc. is not yet working.

build/jam/images/definitions/minimum

@@ -115,6 +115,7 @@ SYSTEM_SERVERS = [ FFilterByBuildFeatures
 	debug_server dns_resolver_server
 	input_server
 	keystore_server
+	launch_daemon
 	mount_server
 	net_server notification_server
 	package_daemon power_daemon

build/jam/packages/Haiku

@@ -124,11 +124,14 @@ AddSymlinkToPackage bin : trash : untrash ;
 AddSymlinkToPackage bin : less : more ;
 
 # scripts and data files
-local bootScripts = Bootscript Bootscript.cd SetupEnvironment
-	InstallerInitScript InstallerFinishScript ;
+local bootScripts = SetupEnvironment InstallerInitScript InstallerFinishScript ;
 SEARCH on $(bootScripts) = [ FDirName $(HAIKU_TOP) data system boot ] ;
 AddFilesToPackage boot : $(bootScripts) ;
 
+local launchScripts = <data!launch>system ;
+SEARCH on $(launchScripts) = [ FDirName $(HAIKU_TOP) data launch ] ;
+AddFilesToPackage data launch : $(launchScripts) ;
+
 # post install scripts
 local postInstallFiles = add_catalog_entry_attributes.sh
 	default_deskbar_items.sh ;