liberation-fonts: postinst can't be called offline

fc-cache should be called on target system. Or maybe we should pass a
suitable directory list to it?

(From OE-Core rev: c5156d26fc9ebacb2141f072aee698a7284d7cb8)

Signed-off-by: Ilya Yanok <yanok@emcraft.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-graphics/ttf-fonts/liberation-fonts_1.04.bb

@@ -34,6 +34,9 @@ do_install () {
 
 pkg_postinst_${PN} () {
 #!/bin/sh
+if [ "x$D" != "x" ] ; then
+	exit 1
+fi
 fc-cache
 }
 

meta/recipes-graphics/ttf-fonts/liberation-fonts_1.06.bb

@@ -35,6 +35,9 @@ do_install () {
 
 pkg_postinst_${PN} () {
 #!/bin/sh
+if [ "x$D" != "x" ] ; then
+	exit 1
+fi
 fc-cache
 }