Pharo port: add missing `AnnouncementSet >> handles:`
...that is needed if one wants (needs) to wait for one of two or more
events, like in `GDBDebugger >> c`:
^ self send: 'continue' andWaitFor: GDBStoppedEvent , GDBThreadGroupExitedEvent
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ports/pharo/src/LibGDBs-Internal-Portlib-Pharo/AnnouncementSet.extension.st Mon Aug 21 16:53:02 2023 +0100
@@ -0,0 +1,6 @@
+Extension { #name : #AnnouncementSet }
+
+{ #category : #'*LibGDBs-Internal-Portlib-Pharo' }
+AnnouncementSet >> handles: anAnnouncement [
+ ^self handlesAnnouncement: anAnnouncement
+]