Add perl to the list of build tools because it is needed to build the perl-related directories (like x2p which generates the perl headers).
Add perl to the list of build tools because it is needed to build the
perl-related directories (like x2p which generates the perl headers).

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