give FileManager a 'FileSystemOptions' ivar, which will be used
to simplify a bunch of code in it.  It should ultimately get inlined
into FileManager.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@120007 91177308-0d34-0410-b5e6-96231b3b80d8
6 files changed