[CMake] Variable TTL_LIBS debug/optimized keywords are getting eaten

[Neumann-A]

netcdf-c/liblib/CMakeLists.txt

Line 103 in 29d070c

LIST(REMOVE_DUPLICATES TLL_LIBS)

This line removes duplicates of debug/optimized keywords in TTL_LIBS which is probably not intended and screws up the generated targets with missing generator expressions