Support for thread-local variables #6
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Note that this changes the thread-local flag to thread-shared This is done to make thread-local be the default
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This adds the ability to split the spec state into multiple structs.
e.g., in a GPU spec you might have state that is one of: thread-local, processor-local, cluster-local and platform-local.
You can control this by adding the --split-state flag and providing a configuration file that uses regexps to define which variables are in each group.
This functionality is tested by the demo.
Supporting multiple structs required a change to the asl2c.py command line because, instead of having just one struct pointer, we need a separate pointer for each struct.
A surprising complication was the handling of RAM blocks. These require an initializer which has to be applied to each struct before it can be used.