increase some test timeouts

pkgs/racket-test/tests/racket/place-channel-limits.rkt

@@ -5,6 +5,10 @@
 ;;  * allocating shared arrays, and 
 ;;  * putting messages into an channel with no receiver
 
+(module+ test
+  (module config info
+    (define timeout 200)))
+
 (define (check mode)
   (for ([i 20])
     (printf "iter ~a\n" i)

pkgs/racket-test/tests/racket/stress/log-receiver.rkt

@@ -2,7 +2,7 @@
 
 (module+ test
   (module config info
-    (define timeout 300)))
+    (define timeout 500)))
 
 (define (do-thread t) (thread t))
 (set! do-thread do-thread)