contrib: harfbuzz: don't use host-specific icu-config
contrib: harfbuzz: don't use host-specific icu-config

(cherry picked from commit 8c33da5ae9106964e1b21877f6724b108de44462)
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