fontcache: allow to pass different fontconfig cache dir

(From OE-Core rev: adfb970efcb30af9b3b420b06b66e2aa6cc00ab4)

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/postinst-intercepts/update_font_cache

@@ -2,6 +2,4 @@
 
 PSEUDO_UNLOAD=1 qemuwrapper -L $D -E LD_LIBRARY_PATH=$D/${libdir}:$D/${base_libdir}\
 					$D${bindir}/fc-cache --sysroot=$D
-chown -R root:root $D${localstatedir}/cache/fontconfig
-
-
+chown -R root:root $D${fontconfigcachedir}