fontconfig: use /storage/.cache/fontconfig as persistent font cache dir, create fontcache only on first boot

Signed-off-by: Stephan Raue <stephan@openelec.tv>

packages/x11/other/fontconfig/init.d/35_fontconfig

@@ -22,7 +22,6 @@
 #
 # runlevels: openelec, textmode
 
-
 FC_CACHE_DIRS="/usr/share/fonts/ /usr/share/xbmc/media/Fonts/"
 
 # hack to support user installed fonts
@@ -35,9 +34,11 @@ FC_CACHE_DIRS="/usr/share/fonts/ /usr/share/xbmc/media/Fonts/"
       mount --bind $SUBFONTS /usr/share/xbmc/media/Fonts/
   fi
 
-
 (
   progress "Creating fontconfig cache"
-    fc-cache $FC_CACHE_DIRS
+    if [ ! -f /storage/.cache/fontconfig/CACHEDIR.TAG ]; then
+      mkdir -p /storage/.cache/fontconfig
+      fc-cache $FC_CACHE_DIRS
+    fi
 )&
 

packages/x11/other/fontconfig/package.mk

@@ -36,6 +36,7 @@ PKG_IS_ADDON="no"
 PKG_AUTORECONF="yes"
 
 PKG_CONFIGURE_OPTS_TARGET="--with-arch=$TARGET_ARCH \
+                           --with-cache-dir=/storage/.cache/fontconfig \
                            --with-default-fonts=/usr/share/fonts/liberation \
                            --without-add-fonts \
                            --disable-dependency-tracking \