changes to installation script for mxnet

7 jobs for develop in 6 minutes and 18 seconds (queued for 1 second)
Status Job ID Name Coverage
  Linux
passed #994190
integrationCaffe2JobLinux

00:02:46

passed #994299
integrationGluonJobLinux

00:02:36

passed #994189
integrationMXNetJobLinux

00:02:46

passed #994193
integrationPythonWrapperTest

00:03:41

passed #994192
integrationTensorflowJobLinux

00:02:45

passed #994194
UnitTestJobLinux

00:02:54

failed #994191
integrationGluonJobLinux

00:00:05