cbuildbot_commands.py: Fix a confusing docstring
cbuildbot_commands.py: Fix a confusing docstring

BUG=None
TEST=None

Change-Id: I7312860f9858183973ea1edb44a44505d71bcde9
Reviewed-on: https://chromium-review.googlesource.com/194366
Reviewed-by: Aviv Keshet <178e8ae417efbe404feca7ab4cb8f0ba8c109369@chromium.org>
Tested-by: Aviv Keshet <178e8ae417efbe404feca7ab4cb8f0ba8c109369@chromium.org>

bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,bpsinc-native/src_third_party_chromite,chadversary/chromiumos.chromite,chadversary/chromiumos.chromite