cmake AsciiDoc examples

asset-group/5ghoul-5g-nr-attacks libs/libzmq/CMakeLists.txt :738 

find_package(AsciiDoc)

zeromq/zeromq4-x CMakeLists.txt :193 

find_package(AsciiDoc)

zeromq/zeromq4-1 CMakeLists.txt :297 

find_package(AsciiDoc)