added comment to compile.sh
--
Change-Id: Id9e80ebc9f05ee7dcdf5d77e84e29cfb89de72cb
Reviewed-on: https://bazel-review.googlesource.com/#/c/1400/
MOS_MIGRATED_REVID=94696229
diff --git a/compile.sh b/compile.sh
index 76ec307..f7edfd5 100755
--- a/compile.sh
+++ b/compile.sh
@@ -14,6 +14,10 @@
# See the License for the specific language governing permissions and
# limitations under the License.
+# This script bootstraps building a Bazel binary without Bazel.
+# It should only be used to bootstrap Bazel itself. The resulting
+# binary can be found at output/bazel
+
set -o errexit
cd "$(dirname "$0")"
