cmd-key-happy: add DTrace function flow script
cmd-key-happy: add DTrace function flow script

andymcd/cmd-key-happy,andymcd/cmd-key-happy,frobware/cmd-key-happy,frobware/cmd-key-happy,jaequery/cmd-key-happy,andymcd/cmd-key-happy,frobware/cmd-key-happy,andymcd/cmd-key-happy,frobware/cmd-key-happy,frobware/cmd-key-happy,jaequery/cmd-key-happy,andymcd/cmd-key-happy,jaequery/cmd-key-happy