Reuse the enum names from X86Desc in the X86Disassembler.

This requires some gymnastics to make it available for C code. Remove the names
from the disassembler tables, making them relocation free.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150303 91177308-0d34-0410-b5e6-96231b3b80d8
6 files changed