FYI: Updated check for shared LLVM library to include svn.

[Xerxes Rånby]

I have pushed a change to improve the check for shared LLVM library to
also find shared LLVM librarys built from LLVM svn trunk.
http://icedtea.classpath.org/hg/icedtea6/rev/b5f6ca242b9f

When LLVM are built from svn then the library name have a svn suffix.

Cheers
Xerxes