Extend sleep for racy run-test 063.

Bug: 2310700
Test: mm test-art-host
Change-Id: Ib4cdd8f18969662847b9e84c2b81f024b34ff754
diff --git a/test/063-process-manager/src/Main.java b/test/063-process-manager/src/Main.java
index e9e522c..311c4e7 100644
--- a/test/063-process-manager/src/Main.java
+++ b/test/063-process-manager/src/Main.java
@@ -16,7 +16,7 @@
         System.out.println("spawning child");
         ProcessBuilder pb = new ProcessBuilder("sleep", "5");
         Process proc = pb.start();
-        Thread.sleep(1000);
+        Thread.sleep(2000);
         checkManager();
         proc.waitFor();
         System.out.println("child died");