De-allocate memory in ShFinalize(). There still seems to be a bug here if the translator is used in a multi-threaded environment. It seems memory local to only one thread is being deallocated - the thread from which ShFinalize() is called. I will look into it closely in the next CL.
Review URL: http://codereview.appspot.com/1878044

git-svn-id: https://angleproject.googlecode.com/svn/trunk@353 736b8ea6-26fd-11df-bfd4-992fa37f6226