MFV r258571:
MFV r258571:

Removes strict-aliasing warnings from newer GCC in tcpdump.

Corresponds to MFC r258573, but for some reason our new pre-commit hooks
will not let us merge it from there.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase