build: extend -Wno-stringop-overflow to LTO link step

GCC's lto-wrapper re-compiles combined IR during linking and doesn't
propagate -Wno-* flags from the compile phase, so the false-positive
-Wstringop-overflow warnings resurfaced at link time.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: linesight

CMakeLists.txt

@@ -236,6 +236,7 @@ else()
     )
     target_link_options(${MODULE_NAME} PRIVATE
         -flto -Wl,--gc-sections
+        -Wno-stringop-overflow
     )
     target_link_libraries(${MODULE_NAME} PRIVATE
         X11 ${GTK3_LIBRARIES}