Do not install lit-cpuid
AFAIK, lit-cpuid is used by the tests.
Installing it causes LLVMExports*.cmake files to depend
on this program.
It causes some serious packaging issues as it would means
that llvm-dev depends on lldb.
Reviewed By: mgorny
Subscribers: delcypher, lldb-commits
Differential Revision: https://reviews.llvm.org/D68537