[extra-tools] Fix extra tools build bot warnings due to incorrect doc

/home/llvmbb/llvm-build-dir/clang-x86_64-debian-fast/llvm.src/tools/clang/tools/extra/clang-tidy/mpi/TypeMismatchCheck.cpp:172:12: warning: parameter 'Complex' not found in the function declaration [-Wdocumentation]
/home/llvmbb/llvm-build-dir/clang-x86_64-debian-fast/llvm.src/tools/clang/tools/extra/clang-tidy/mpi/TypeMismatchCheck.cpp:206:12: warning: parameter 'Complex' not fo

llvm-svn: 277578