Add missing singletons to Global Singleton class

* Add Integer{127,1,32767}Type and Bottom Type from soot.jimple.toolkits.typing.fast to singletons.xml
* Generate new Singletons
* Modify Types accordingly

If soot is run several times in one instance of the JVM, these 4 Types are not added to the Global TypeNumberer after the first call to G.reset().
The general constructor of Type handles this, but since these objects do not need to be recreated that constructor will not be called.