i#3106: add analysis_tool_t::initialize() #3319
Merged
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Adds a separate analysis_tool_t::initialize() method to better handle
tool initialization that can fail, separating it out from the
constructor. This simplifies subclassing as well.
Updates the view_t and opcode_mix_t tools to move their module mapping
and other code into initialize(). Leaves updating the simulator tools
for future work.
Changes raw2trace_directory_t to return error strings instead of
aborting the process, and splits its constructor from new initialize()
and initialize_module_file() methods.
Fixes #3106