libxml2: force ac_cv_header_ansidecl_h=no, it seems sometimes ansidecl.h is (wrongly) found

Signed-off-by: Stephan Raue <stephan@openelec.tv>
connman: dont depend on ntp
remove package: ntp
busybox: enable 'ntpd' applet
libffi: fix libffi.pc
glib: drop libffi hack
libffi: build static
util-linux: fix pkgconf
kmod: fix pkgconf
systemd: fix pkgconf
pciutils: fix pkgconf
freetype: fix pkgconf
glew: fix pkgconf
taglib: fix pkgconf
xf86-video-intel: disable dri3

TODO: why fails ?
toolchain: switch to pkgconf

WARNING this breaks *some* packages that ship wrong pkgconfig info