RFC: [patch] Update shark for LLVM r94686 API change.

[Xerxes Rånby]

The attached updates Shark for LLVM r94686 API change.
The use of llvm context module_providers have been removed to fix some
subtile performance related LLVM JIT bugs
(http://llvm.org/bugs/show_bug.cgi?id=5737 and
http://llvm.org/bugs/show_bug.cgi?id=5735).
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20100125/095204.html

Ok to commit?

Xerxes

2010-02-01  Xerxes Rånby  <xerxes at zafena.se>

    * ports/hotspot/src/share/vm/shark/sharkCompiler.cpp
    (SharkCompiler::SharkCompiler): Use sharkContext::module
    instead of sharkContext::module_provider when using LLVM 2.7
    to handle LLVM r94686 API change.
    * ports/hotspot/src/share/vm/shark/sharkContext.hpp
    (sharkContext::module): Made public when using LLVM 2.7.
    (sharkContext::module_provider): Undefine when using LLVM 2.7.
    * ports/hotspot/src/share/vm/shark/llvmHeaders.hpp
    (llvm/ModuleProvider.h): Undefine when using LLVM 2.7.


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