Brain surgery on the make system

[Phil Holmes]

John,

Part of your re-org of the build system deleted the files 
Documentation/xx/included/GNUmakefile - where xx was cs, hu and zh.  Those 
particular files were there in order to make the directories non-empty and 
thus trackable by git.  Deleting them has led to warnings in the doc build 
system.  When this was discussed in Feb this year, it was decided to go with 
"empty" directories rather than hacking the build system to avoid the 
warning.  Could you restore these directories, please?

--
Phil Holmes