Comment 4 for bug 871757

https://android-build.linaro.org/builds/~linaro-android/landing-snowball-11.11-release/#build=3 has the same error as bug 893089:
https://bugs.launchpad.net/lava-dispatcher/+bug/893089

it has information as below:

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-bash: mmc: command not found

root@master:~# cu: Got hangup signal
Connected.
Connected.