[arch-general] Move from libjpeg-turbo to mozjpeg

Hi there, Mozilla have made a fork of the libjpeg-turbo package called mozjpeg, which features improved encoding: https://blog.mozilla.org/research/2014/03/05/introducing-the-mozjpeg-project... I'd like to propose making the switch. The "library configuration defaults are the same as for libjpeg-turbo, in order to make transitions as painless as possible". A PKGBUILD can be found on the AUR: https://aur.archlinux.org/packages/mozjpeg/ Thanks for your consideration, N30N.