[DWARFLinker][Reland] Handle DW_OP_GNU_push_tls_address while check for variable location.

The D147066 changed the way how DWARF location expressions are handled.
Now expressions are parsed and their operands are analysed. New handling
misses the DW_OP_GNU_push_tls_address extention. This patch adds handling
DW_OP_GNU_push_tls_address while checking for addresses.

Differential Revision: https://reviews.llvm.org/D153010