C++: add FutileParams.ql to C++ suite
C++: add FutileParams.ql to C++ suite

In theory this query will produce no results on C++ code; in practice, I
suspect the "cpp" suite is often run on code compiled as C, so it is
likely to be worth running anyways.

github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql,github/codeql