LinuxDeviceProcess: Quote environment variable values.

The current code breaks for values that contain spaces.

Change-Id: Ia2a318dcac09a8d1c1ce368378a33c633f28bf49
Reviewed-by: hjk <hjk121@nokiamail.com>
Debugger: Fix debug log

Change-Id: Id02b310e24d7f13fd444b30f20e0af10244f1798
Reviewed-by: hjk <hjk121@nokiamail.com>