redshift-jjk: upgrade to 1.9.1
nginx-jjk: upgrade to 1.6.0
zen-blua-jjk: upgrade to 0.14.1
rxvt-unicode-better-wheel-scrolling: upgrade to 9.20
mesa-jjk: disable gallium egl backend, so prefer dri2 backend (FS#40096)
php-jjk: upgrade to 5.5.12
firefox-jjk: Import from ABS
firefox-jjk: Remove dependency to icu

It does add ~13 MiB to the package, but saves the ~30 MiB from the icu package,
plus the need to keep icu package files in pacman's cache. IOW, for now we'll
see if that works for us.