Update run script to deal with change to build of REPL shaded JAR

run

@@ -89,9 +89,11 @@ if [ -e "$FWDIR/lib_managed" ]; then
   CLASSPATH+=":$FWDIR/lib_managed/bundles/*"
 fi
 CLASSPATH+=":$REPL_DIR/lib/*"
-for jar in `find "$REPL_DIR/target" -name 'spark-repl-*-shaded-hadoop*.jar'`; do
-  CLASSPATH+=":$jar"
-done
+if [ -e repl-bin/target ]; then
+  for jar in `find "repl-bin/target" -name 'spark-repl-*-shaded-hadoop*.jar'`; do
+    CLASSPATH+=":$jar"
+  done
+fi
 CLASSPATH+=":$BAGEL_DIR/target/scala-$SCALA_VERSION/classes"
 for jar in `find $PYSPARK_DIR/lib -name '*jar'`; do
   CLASSPATH+=":$jar"