This reverts commit
22f6ec65bfc2332bd0c638ae378d0e4c67992f2d.
Mickey's change made systems unable to update font systems:
Configuring ttf-dejavu-common
/usr/lib/opkg/info/ttf-dejavu-common.postinst: line 1: update-fonts: not found
postinst script returned status 127
DESCRIPTION ?= "TrueType font package ${PN}"
SECTION = "fonts"
PRIORITY = "optional"
-RRECOMMENDS_${PN} = "font-update-common"
+RRECOMMENDS += "font-update-common"
# we don't need a compiler nor a c library for these fonts
INHIBIT_DEFAULT_DEPS = "1"