hg: lambda/lambda/jdk: Fix broken test, synthetic method should be skipped.

[henry.jen at oracle.com]

Changeset: 1fc04d7d379f
Author:    henryjen
Date:      2013-03-06 19:20 -0800
URL:       http://hg.openjdk.java.net/lambda/lambda/jdk/rev/1fc04d7d379f

Fix broken test, synthetic method should be skipped.

! test/java/lang/StringBuffer/TestSynchronization.java