ttf-bitstream-vera: Use fontcache class for postinstall

Using the fontcache class means we can run the postinstall at build time
so this is generally more efficient.

(From OE-Core rev: 00cc684885efa555f7eac7653482f72095b1c443)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-graphics/ttf-fonts/ttf-bitstream-vera_1.10.bb

@@ -10,7 +10,9 @@ LIC_FILES_CHKSUM = "file://COPYRIGHT.TXT;md5=27d7484b1e18d0ee4ce538644a3f04be"
 PR = "r7"
 RDEPENDS_${PN} = "fontconfig-utils"
 
-inherit allarch
+inherit allarch fontcache
+
+FONT_PACKAGES = "${PN}"
 
 SRC_URI = "${GNOME_MIRROR}/ttf-bitstream-vera/1.10/ttf-bitstream-vera-${PV}.tar.bz2" 
 
@@ -31,12 +33,6 @@ do_install () {
         done 
 } 
 
-pkg_postinst_${PN} () {
-#!/bin/sh
-fc-cache
-}
-
-
 FILES_${PN} = "/etc ${datadir}/fonts"
 
 SRC_URI[md5sum] = "bb22bd5b4675f5dbe17c6963d8c00ed6"