Make tools/tmux do the right thing for non-mono builds
Make tools/tmux do the right thing for non-mono builds

TBR=primiano
Change-Id: If086419de7004e5255d25f42e8dbb928f3e7403f

google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto