[PATCH 0/6] MR9957: PDB speedup 3

[eric pouech (＠epo)]

This serie continues the optimization for gaining speed and memory
consumption in PDB reader.
It mostly consists of refactoring, and preparing the next serie by
letting a couple of helpers be compatible with symref\_t 
descriptors.
It also fixes dbghelp to be compatible with native behavior wrt.
variables with thread storage.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/9957