All 6 case-sensitivity shim headers in tools/linux/overlay/include/
now use #include_next instead of #include to forward to the real
MinGW system header, avoiding infinite preprocessor recursion on
Linux (Debian/WSL) where overlay/include is first in the search path.
Fixes build failures on Debian WSL (GCC 12) for all configurations.
Also update nsis7z.dll binaries built with the fixed overlay.
Simone
c2c91b9e48