[CMake] Documentation bug in MacroAddFileDependencies.cmake

[Marcel Loose]

Hi all,

I noticed while browsing the documentation that there's a documentation
bug in MacroAddFileDependencies.cmake. The docs refer to a completely
different macro (MACRO_OPTIONAL_FIND_PACKAGE), which BTW is not present
at all in the Modules directory (would be nice to have though). 
This bug is also present in the CVS head revision.

Best regards,
Marcel Loose.