docbook-xsl-stylesheets: Fixed bnc#809609 and updated to version 1.78.0

This update fixes the following issues with docbook-xsl-stylesheets:
- bnc#809609: fixed error in specfile that generated catalog entries pointing to the DocBook4 stylesheets
- Updated to version 1.78.0
+ see http://snapshots.docbook.org/xsl/RELEASE-NOTES.html#V1.78.0 for details

Fixed bugs
Selected Binaries
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