Fontconfig must have a cachedir, so hardcode one for now

android/qa/sc/fonts.conf

-<?xml version="1.0" encoding="UTF-8"?>
+<?xml version="1.0"?>
 <!DOCTYPE fontconfig SYSTEM "fonts.dtd">
 <!-- /etc/fonts/fonts.conf file to configure system font access -->
 <fontconfig>
@@ -50,7 +50,11 @@
 
 <!-- Font cache directory list -->
 
-        <!-- NO THANKS -->
+	<!-- Yeah this hardcoding is wrong of course, will have to fix
+	     later to patch in proper code in fontonfig on Android to
+	     find out a good place.
+	-->
+	<cachedir>/data/data/org.libreoffice.android.qa.sc/fontconfig</cachedir>
 
 	<config>
 <!--