turn off instrumentated task cycle detection

BUG=
R=dgrove@google.com

Review URL: https://codereview.chromium.org//614403002

git-svn-id: http://dart.googlecode.com/svn/trunk@40844 260f80e4-7a28-3924-810f-c04153c831b5
diff --git a/tools/VERSION b/tools/VERSION
index 8e6bf6c..db272d8 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -28,4 +28,4 @@
 MINOR 7
 PATCH 0
 PRERELEASE 4
-PRERELEASE_PATCH 1
+PRERELEASE_PATCH 2