[lanai] Add ELF enum value and relocations.

Add ELF enum value and relocations for Lanai backed.

General Lanai backend discussion on llvm-dev thread "[RFC] Lanai backend" (http://lists.llvm.org/pipermail/llvm-dev/2016-February/095118.html).

Differential Revision: http://reviews.llvm.org/D17008



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@262394 91177308-0d34-0410-b5e6-96231b3b80d8
18 files changed