Cache thread status and update it on `=stopped` and `=running` events
...rather than asking thread info each time. This saves us the need to
issue `-thread-info` each time *some* threas stops/runs.
"{ Package: 'jv:libgdbs' }"
"{ NameSpace: Smalltalk }"
GDBThreadState subclass:#GDBThreadStateUnknown
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'GDB-Core'
!
!GDBThreadStateUnknown methodsFor:'testing'!
isUnknown
^ true
"Created: / 12-07-2017 / 13:35:37 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !