Fix missing [.
Disable /tmp and restart the VM to take effect.

It looks like lint builds run out of space on /tmp and cause spurious errors
along the lines of:

debug32/hxge_rxdma.ln:
"../../common/sys/systm.h", line 78: lint error: couldn't write record to file

A repeated build ran into the same problem, but for a different lint file.
VMs built this way likely need to conserve their RAM for build processes.