main/icu: upgrade to 54.1
main/harfbuzz: rebuild with icu-54
main/gptfdisk: remove icu dependency
main/mpd: upgrade to 0.19.1
main/open-vm-tools: rebuild for icu-54
main/php: rebuild for icu-54
main/qt5-qtbase: rebuild with icu-54
main/qt5-qtwebkit: rebuild with icu-54
main/webkitgtk: upgrade to 2.4.7
main/firefox: upgrade to 31.2.0 esr

dont build xulrunner separately
testing/firefox: rebuild with icu-54