message: kokoro: Don't show bazel progress.
  Fixes
diff: @@ -24,7 +24,7 @@ echo "---------------------------------------------------------------"
  echo " Building Verible"
  echo "---------------------------------------------------------------"
  set -x
  -bazel build --cxxopt='-std=c++17' //...
  +bazel build --noshow_progress --cxxopt='-std=c++17' //...
  RET=$?
  set +x
  @@ -34,7 +34,7 @@ if [[ $RET = 0 ]]; then
  echo " Testing Verible"
  echo "---------------------------------------------------------------"
  set -x
  - bazel test --cxxopt='-std=c++17' //...
  + bazel test --noshow_progress --cxxopt='-std=c++17' //...
  RET=$?
  set +x
  else
  