Add the "install" applet, move get_ug_id to libbb as its used by chown,
chgrp and install.
diff --git a/include/applets.h b/include/applets.h
index 0b65266..b1425fa 100644
--- a/include/applets.h
+++ b/include/applets.h
@@ -283,6 +283,9 @@
 #ifdef CONFIG_INSMOD
 	APPLET(insmod, insmod_main, _BB_DIR_SBIN, _BB_SUID_NEVER)
 #endif
+#ifdef CONFIG_INSTALL
+	APPLET(install, install_main, _BB_DIR_USR_BIN, _BB_SUID_NEVER)
+#endif
 #ifdef CONFIG_IP
 	APPLET(ip, ip_main, _BB_DIR_BIN, _BB_SUID_NEVER)
 #endif