Set EM_CONFIG when building runtime
Set EM_CONFIG when building runtime

Need to set the path to the config. Otherwise the configuration
in the home directory is used

MichaReiser/speedy.js,MichaReiser/speedy.js,MichaReiser/speedy.js,MichaReiser/speedy.js,MichaReiser/speedy.js,MichaReiser/speedy.js