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J. Nick Koston
6feb0108f0
Apply the same linker wrap technique used on ESP32 (PR #14362) to ESP8266. ESPHome logging uses ets_printf, not libc printf, so the FILE*-based printf path is dead code. The stubs redirect through vsnprintf + fwrite, allowing the linker to GC _vfprintf_r. Savings are smaller than ESP32 (~900 bytes vs ~11 KB) because ESP8266's newlib printf is more modular, but ESP8266 has much less flash headroom so every byte counts.
