message: Make extracting of strings from volatile-status.txt resilient
  to strings with spaces.
  Fixes:
diff: # See the License for the specific language governing permissions and
  # limitations under the License.
  -GIT_DATE="$(grep -s GIT_DATE bazel-out/volatile-status.txt | cut -f2 -d' ')"
  -GIT_DESC="$(grep -s GIT_DESCRIBE bazel-out/volatile-status.txt | cut -f2 -d' ')"
  +# The file where bazel stores name/value pairs
  +BAZEL_VOLATILE=bazel-out/volatile-status.txt
  +
  +GIT_DATE="$(grep -s GIT_DATE $BAZEL_VOLATILE | cut -f2- -d' ')"
  +GIT_DESC="$(grep -s GIT_DESCRIBE $BAZEL_VOLATILE | cut -f2- -d' ')"
  # Timestamp is always provided by bazel.
  -TS_INT=$(grep -s BUILD_TIMESTAMP bazel-out/volatile-status.txt | cut -f2 -d' ')
  +TS_INT="$(grep -s BUILD_TIMESTAMP $BAZEL_VOLATILE | cut -f2 -d' ')"
  test -z "$TS_INT" || TS_STRING="$(date +"%Y-%m-%dT%H:%M:%SZ" -u -d @$TS_INT)"
  test -z "$GIT_DATE" || echo "#define VERIBLE_GIT_DATE $GIT_DATE"
  