library.

Installs tblgen (required by Clang).

Translates handling of user settings and platform-dependant options to
its own file, where it can included by another project.

Installs the .cmake files required by projects like Clang.

llvm-svn: 124816

llvm-svn: 115039

llvm-svn: 110763

llvm-svn: 110563

The user can use a cmake function for obtaining the LLVM libraries
corresponding to a list of LLVM components.

llvm-svn: 110560