fontconfig: fc-cache fails when cached dir mtime is in the future

This udpate fixes the following issue for fontconfig:
-bnc#227385: When e. g. system time is set before mtime of /usr/share/fonts or its subdirectories, affected dirs do not get cached and fc-cache is reporting "(dir): failed to write cache". This update should fix it.

Fixed bugs
bnc#227385
fc-cache always fails with error "(dir): failed to write cache"
Selected Binaries
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