chore: Print kokoro job name in script (#155)

* chore: Check in initial kokoro build config and build script

* chore: Print out kokoro job name

* remove space in printed out strings

Author: jihuin

.kokoro/release.sh

@@ -1,2 +1,6 @@
+#!/bin/bash
+
 # Make sure `JAVA_HOME` is set.
-echo "JAVA_HOME = $JAVA_HOME"
+echo "JAVA_HOME=$JAVA_HOME"
+
+echo "KOKORO_JOB_NAME=${KOKORO_JOB_NAME}"