[cindex.py] Allow to configure the path of libclang

By calling cindex.Config.set_library_path(path) or
cindex.Config.set_library_file(file) it is possible to specify from where
we load libclang. This fixes an open FIXME.

We also point the user to these functions, in case libclang can not be
loaded sucessfully.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@163121 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed