Update Apache Lucene core to version 2.9.4.

The new version brings in many bugfixes and performance
improvements. Unfortunately this also means we lose the
Windows specific enhancements in the long_

Update Apache Lucene core to version 2.9.4.

The new version brings in many bugfixes and performance
improvements. Unfortunately this also means we lose the
Windows specific enhancements in the long_path.patch but
it must be expected the newer versions of Lucene will
have much better portability.

We also bring in support for using preinstalled version 3
from BZ i115241 (author: bero@arklinux).


git-svn-id: https://svn.apache.org/repos/asf/incubator/ooo/trunk@1337602 13f79535-47bb-0310-9956-ffa450edef68

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