[FIRRTL][SpecializeOption] Allow specialization of non-existent option#10158
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[FIRRTL][SpecializeOption] Allow specialization of non-existent option#10158
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This adds
<option>?=<case>primitive to SpecializeOption that doesn't throw an error when there is no option. Also allows<default>as a valid a case name to specialize subset of options to default.Unfortunately this was necessary because for example we want to always pass
Platform=ASICto the command line but it's very difficult to ensure Platform option always exists beforeahand.