package/fontconfig: bump version to 2.12.4

package/fontconfig: bump version to 2.12.4

Removed patch applied upstream:
https://cgit.freedesktop.org/fontconfig/commit/?id=1ab5258f7c2abfafcd63a760ca08bf93591912da

We need to keep the host-gperf dependency even when upstream ships the
generated file fcobjshash.gperf in its release tarball because in the
next release this file is removed:
https://cgit.freedesktop.org/fontconfig/commit/?id=651f1227646174b5be0186b4b6cdff3a7134d869
and is always generated during build:
https://bugs.freedesktop.org/show_bug.cgi?id=101280

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>