Changeset 10561:b2a85a0c0571
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config: Add two options for setting the kernel command line.

Both options accept template which will, through python string formatting,
have "mem", "disk", and "script" values substituted in from the mdesc.
Additional values can be used on a case by case basis by passing them as
keyword arguments to the fillInCmdLine function. That makes it possible to
have specialized parameters for a particular ISA, for instance.

The first option lets you specify the template directly, and the other lets
you specify a file which has the template in it.