pFBN 4.2

• pemu: vita: fix roms paths in config.cfg not correctly loaded
• pemu: fix input configuration option menu (inputs, highlight, textures..)
• pfbn: fix option menu audio interpolation loop
• pemu: vita: fix "Renderer::onUpdate" called twice
• pfbn: vita: add crappy frameskip option (not working very well..)
• pemu: bump version to 4.2