Disable documentation target using a CMake configuration option

Hello, I pull CMocka into many CMake projects as a subproject. I updated the version I'm using and there is now a "docs" target. This conflicts with existing docs targets in all of my builds, causing a CMake configuration failure. Are y'all open to having the docs target controlled by a build option? A patch is attached. Cheers, Phillip Johnston Principal, Firmware & Architecture Consulting https://embeddedartistryconsulting.com/ | Blog https://embeddedartistry.com/ | Newsletter https://embeddedartistry.com/newsletter