Add boot slot support

Change-Id: I7eaf80e327985f53791f90fbdebad022a9650d31
diff --git a/gui/objects.hpp b/gui/objects.hpp
index 0d96927..8d4484a 100644
--- a/gui/objects.hpp
+++ b/gui/objects.hpp
@@ -357,6 +357,7 @@
 	int mountsystemtoggle(std::string arg);
 	int setlanguage(std::string arg);
 	int twcmd(std::string arg);
+	int setbootslot(std::string arg);
 
 	int simulate;
 };