Description of problem:
Running fc-cache with /usr/share/fonts takes too much time and may breaks the cache for parents when installing multiple font packages or upgrading fontconfig, especially sometimes happens on the installation say.
As the macro in fontpackages does, please follow it up and use fc-cache /usr/share/fonts/<your font directory> instead of /usr/share/fonts.

Version-Release number of selected component (if applicable):
baekmuk-bdf-fonts-2.2-13.fc19.noarch

How reproducible:
always

Steps to Reproduce:
1.rpm -q --scripts baekmuk-bdf-fonts-2.2-13.fc19.noarch
2.
3.

Actual results:
postinstall scriptlet (using /bin/sh):
if [ -x /usr/bin/fc-cache ]; then
  /usr/bin/fc-cache /usr/share/fonts
fi
postuninstall scriptlet (using /bin/sh):
if [ "$1" = "0" ]; then
  if [ -x /usr/bin/fc-cache ]; then
    /usr/bin/fc-cache /usr/share/fonts
  fi
fi

Expected results:
the directory should be /usr/share/fonts/<your font directory> instead

Additional info:
should be same on rawhide and f20