[llvm-objdump] Map STT_TLS to ST_Other (previously ST_Data)

ST_Data is used to model BFD `BFD_OBJECT`.
A STT_TLS symbol does not have the `BFD_OBJECT` flag in BFD.
This makes sense because a STT_TLS symbol is like in a different address space,
normal data/object properties do not apply on them.

With this change, a STT_TLS symbol will not be displayed as 'O'.
This new behavior matches objdump.

Differential Revision: https://reviews.llvm.org/D96735