Zig's ubsan runtime cannot be bundled on Windows (LNK4229),
leaving __ubsan_handle_* symbols unresolved when the static
archive is consumed by an external linker like MSVC link.exe.
freetype, glslang, spirv-cross, and highway already suppress
ubsan unconditionally. Add MSVC-conditional suppression to the
seven C dependencies that were missing it: harfbuzz, libpng,
dcimgui, wuffs, oniguruma, zlib, and stb.
The fix is gated on abi == .msvc so ubsan coverage is preserved
on Linux and macOS where bundle_ubsan_rt works.
a10854654d