[ELF][x86-64] Implement static relocation model for TLS.

This implements the static relocation model for GOT accesses to TLS.
[ELF] Add more absolute atoms. Simplify how they are resolved.
[ELF][x86-64] Add the _GLOBAL_OFFSET_TABLE_ Atom in the correct location.

Now we link against glibc without --noinhibit-exec.