Snippy build is broken

[asi-sc]

At cmake configuration step we have the following cmake error (how to build snippy https://github.com/asi-sc/snippy/blob/main/llvm/tools/llvm-snippy/README.md#building-and-installing-generator )

CMake Error at cmake/modules/LLVMProcessSources.cmake:116 (message):                                                           
  Found erroneous configuration for source file CFGPrinterPass.cpp                                                                                                                                                                                            
                                                                                                                               
  LLVM's build system enforces that all source files are added to a build                                                      
  target, that exactly one build target exists in each directory, and that                                                     
  this target lists all files in that directory.  If you want multiple                                                         
  targets in the same directory, add PARTIAL_SOURCES_INTENDED to the target                                                    
  specification, though it is discouraged.                                                                                     
                                                                                                                               
  Please update                                                                                                                
  llvm/tools/llvm-snippy/lib/CMakeLists.txt