updated configuration files

[subarnasaikia]

JIRA Ticket: No

What's in the PR

• Removed README.4src & README.4bin file from EXTRA_DIST in the automake file.
• Add the command to delete the doxygen.log file, which is created when we run builddocs.sh.

How to test manually

• Run ./builddocs.sh "clean"

Automatic testing

• [ ] PR adds/updates unit tests

Documentation

• [ ] PR adds/updates documentation

Organizational

• [ ] PR includes new dependencies. _{^{Only dependencies under approved licenses are allowed. LICENSE and NOTICE files in the respective modules where dependencies have been added as well as in the project root have been updated.}}

[DrDub]

Thanks so much!