The repl was not included in the maven repositories which breaks the build for a number of other projects. There are two easy solutions for getting around this until it gets included in the next updates.
Take the jar file from this gist (click the download gist button) and run the following command in the terminal with it to include it in your local maven repository (~/.m2)
mvn install:install-file -Dfile=spark-repl_2.10-1.2.0.jar -DgroupId=org.apache.spark -DartifactId=spark-repl_2.10 -Dversion=1.2.0 -Dpackaging=jar
git clone -b v1.2.0 https://github.com/apache/spark.git
cd spark/repl
cp ../scalastyle-config.xml ./
mvn install -DskipTests