Copy the SparkR source package with LFTP
Copy the SparkR source package with LFTP

This PR adds a line in release-build.sh to copy the SparkR source archive using LFTP

Author: Shivaram Venkataraman <ad63b47dfac1951bde2b661ba9fbbe123f686bee@cs.berkeley.edu>

Closes #16226 from shivaram/fix-sparkr-copy-build.

(cherry picked from commit 934035ae7cb648fe61665d8efe0b7aa2bbe4ca47)
Signed-off-by: Shivaram Venkataraman <ad63b47dfac1951bde2b661ba9fbbe123f686bee@cs.berkeley.edu>

SnappyDataInc/spark,ibm-research-ireland/sparkoscope,Panos-Bletsos/spark-cost-model-optimizer,Panos-Bletsos/spark-cost-model-optimizer,kimoonkim/spark,big-pegasus/spark,ibm-research-ireland/sparkoscope,big-pegasus/spark,ibm-research-ireland/sparkoscope,kimoonkim/spark,ibm-research-ireland/sparkoscope,metamx/spark,huang1900/spark,SnappyDataInc/spark,huang1900/spark,ibm-research-ireland/sparkoscope,metamx/spark,big-pegasus/spark,big-pegasus/spark,kimoonkim/spark,kimoonkim/spark,metamx/spark,kimoonkim/spark,Panos-Bletsos/spark-cost-model-optimizer,big-pegasus/spark,SnappyDataInc/spark,Panos-Bletsos/spark-cost-model-optimizer,big-pegasus/spark,huang1900/spark,ibm-research-ireland/sparkoscope,metamx/spark,metamx/spark,Panos-Bletsos/spark-cost-model-optimizer,huang1900/spark,SnappyDataInc/spark,metamx/spark,Panos-Bletsos/spark-cost-model-optimizer,huang1900/spark,huang1900/spark,SnappyDataInc/spark,kimoonkim/spark,huang1900/spark,SnappyDataInc/spark,ibm-research-ireland/sparkoscope,big-pegasus/spark,SnappyDataInc/spark,Panos-Bletsos/spark-cost-model-optimizer,metamx/spark,kimoonkim/spark