Add an option to the libdeps analyzer and corresponding CLI tool such that, for a given library, the tool will output all dependent nodes of type "program."

This will allow developers to quickly see what unittests a library is linked into, as well as if the library is part of mongod, mongos, or both (or neither). In turn, this should allow developers to quickly check, given a specific C++ file, what binary it is a part of (by determining what library the source file is the source for, and then seeing what binaries that library is depended-upon by).