cmake: fix backwards compatibility logic #6271
Merged
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After a comment from @garbear at https://github.com/garbear/peripheral.joystick/tree/cmake I realized that I never PR'ed this fix for the backwards compatibility logic in our cmake buildsystem which is intended to take care of being able to still build binary addons that use "xbmc" include paths instead of "kodi" ones.
The problem is that the logic overwrites the actual "kodi" header files with ones that only contain a warning and a forwarded include if the buildsystem is set up so that the "xbmc" include directory is a symlink to the "kodi" include directory.
This changes the logic to only write the forwarding header files if they don't already exist (which is the case when using a symlink).