plugin prevents it from getting tested) from mysql-next-mr-bugfixing
to mysql-trunk-bugfixing.

Original revision:
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revision-id: zhenxing.he@sun.com-20091204014339-2m06r42vajhm9vke
committer: He Zhenxing <zhenxing.he@sun.com>
branch nick: 5.1-rep-semisync
timestamp: Fri 2009-12-04 09:43:39 +0800
message:
  Bug#49170 Inconsistent placement of semisync plugin prevents it from getting tested
  
  Add $basedir/lib/plugin to the search paths for semisync plugins.
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