jsterm-911456: Allow gcli/cli module to be frozen
jsterm-911456: Allow gcli/cli module to be frozen

Previously it was assumed that the logErrors property could be mutated
from the outside, now there are property accessors to allow this.

Signed-off-by: Joe Walker <7a17872fbb32c7d760c9a16ee3076daead11efcf@mozilla.com>

joewalker/gcli,mozilla/gcli,mozilla/gcli,joewalker/gcli,mozilla/gcli