emscripten: replace WARN_ON_UNDEFINED_SYMBOLS with ERROR_ON_UNDEFINED_SYMBOLS
emscripten: replace WARN_ON_UNDEFINED_SYMBOLS with ERROR_ON_UNDEFINED_SYMBOLS

floooh/fips,anthraxx/fips,mgerhardy/fips,code-disaster/fips,anthraxx/fips,mgerhardy/fips,floooh/fips,code-disaster/fips,michaKFromParis/fips,floooh/fips,michaKFromParis/fips