Silence -Wshadow warning in stb_image.

examples/common/nanovg/nanovg.cpp

@@ -36,6 +36,7 @@ BX_PRAGMA_DIAGNOSTIC_POP();
 
 BX_PRAGMA_DIAGNOSTIC_PUSH();
 BX_PRAGMA_DIAGNOSTIC_IGNORED_CLANG_GCC("-Wmissing-field-initializers");
+BX_PRAGMA_DIAGNOSTIC_IGNORED_CLANG_GCC("-Wshadow");
 #define STB_IMAGE_IMPLEMENTATION
 #include <stb/stb_image.c>
 BX_PRAGMA_DIAGNOSTIC_POP();