Version 1.3.0-dev.7.12

Merge parts of revision 34753 by
svn merge -c 34753 https://dart.googlecode.com/svn/branches/bleeding_edge/dart/samples/ trunk/dart/samples/

CL describing this merge:
https://codereview.chromium.org/227533007/

git-svn-id: http://dart.googlecode.com/svn/trunk@34792 260f80e4-7a28-3924-810f-c04153c831b5
diff --git a/tools/VERSION b/tools/VERSION
index 42c6c7d..773efad 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -28,4 +28,4 @@
 MINOR 3
 PATCH 0
 PRERELEASE 7
-PRERELEASE_PATCH 11
+PRERELEASE_PATCH 12