Fix syntax error in mkdirs.sh script
Currently the mkdirs.sh script will not create the /p4/common/bin or the /p4/common/config folders due to a syntax error and failure in the conditional check. This leads to a cascading failure in other parts of the script.
From my limited testing, the CN value is never an empty string because if mkdirs.sh is not run in test mode, the value is imported from the mkdirs.cfg file.