ast_coredumper: Fix deleting results when output dir is set

When OUTPUTDIR is set to another directory and the
--delete-results-after is set, the resulting txt files are
not deleted.

ASTERISK-29794 #close

Change-Id: I1c0071f6809a1e3f5cfc455d6eb08378bc0d7286

contrib/scripts/ast_coredumper

@@ -314,7 +314,11 @@ for i in "${!COREDUMPS[@]}" ; do
 	fi
 
 	if $DELETE_RESULTS_AFTER ; then
-		rm -rf "${cf//:/-}"-{brief,full,thread1,locks,info}.txt
+		to_delete=$cf
+		if [ -n "$OUTPUTDIR" ] ; then
+			to_delete="$OUTPUTDIR/$cfname"
+		fi
+		rm -rf "${to_delete//:/-}"-{brief,full,thread1,locks,info}.txt
 	fi
 done