actually export SYSTEM_LIBNUMBERTEXT_DATA in config_host.mk

Change-Id: I5cd6d0b3fe610d0152a3d5345d8412161a1d0544
diff --git a/config_host.mk.in b/config_host.mk.in
index b5e2dc0..70f0ecb 100644
--- a/config_host.mk.in
+++ b/config_host.mk.in
@@ -550,6 +550,7 @@ export SYSTEM_LIBEXTTEXTCAT=@SYSTEM_LIBEXTTEXTCAT@
export SYSTEM_LIBEXTTEXTCAT_DATA=@SYSTEM_LIBEXTTEXTCAT_DATA@
export SYSTEM_LIBLANGTAG=@SYSTEM_LIBLANGTAG@
export SYSTEM_LIBNUMBERTEXT=@SYSTEM_LIBNUMBERTEXT@
export SYSTEM_LIBNUMBERTEXT_DATA=@SYSTEM_LIBNUMBERTEXT_DATA@
export SYSTEM_LIBORCUS=@SYSTEM_LIBORCUS@
export SYSTEM_LIBPNG=@SYSTEM_LIBPNG@
export SYSTEM_LIBXML=@SYSTEM_LIBXML@