user/*: APKBUILD bashism removal, part one (a-p)

user/ae_fonts/APKBUILD

user/boost/APKBUILD

user/cgit/APKBUILD

user/chrony/APKBUILD

user/clang/APKBUILD

user/dialog/APKBUILD

user/fftw/APKBUILD

user/firefox-esr/APKBUILD

user/gnutls/APKBUILD

user/graphite2/APKBUILD

user/intlfonts/APKBUILD

user/ipaexfont/APKBUILD

user/kate/APKBUILD

user/libcdio-paranoia/APKBUILD

user/libdbusmenu-qt/APKBUILD

user/libkdegames/APKBUILD

user/libnl3/APKBUILD

user/libtheora/APKBUILD

user/libtommath/APKBUILD

user/llvm8/APKBUILD