Add new config options to b-test

Change b-test to allow setting the log directory and the install
directory on the command line. The aim is to allow relocating
output files when executed in the CI.

Signed-off-by: Gyorgy Szing <Gyorgy.Szing@arm.com>
Change-Id: Idd1d82b4abbc6d1ed914c04573a3191183698d0b
2 files changed