contrib: make sure freetype depends on zlib
contrib: make sure freetype depends on zlib

(cherry picked from commit 8f6f849be5322de77a5acc0a6d8e1fe978000573)
Signed-off-by: Jean-Baptiste Kempf <7b85a41a628204b76aba4326273a3ccc74bd009a@videolan.org>

jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2,jomanmuk/vlc-2.2