Update package installation in README.md
Update package installation in README.md

Change-Id: I59662d1bdd8702662922b1ccfa97d4d79db0d4af
Signed-off-by: George Keishing <bef0a9ecac45fb57611777c8270153994e13fd2e@in.ibm.com>

openbmc/openbmc-test-automation,openbmc/openbmc-test-automation