Adds offline trace handling of VDSO code by dumping the actual contents of the VDSO pages into drmodtrack custom data and using it to decode instructions during post-processing.
Updates drmodtrack to handle binary data in custom fields.
Refactors how 3rd-party custom module fields are handled for drcachesim as they now must be multiplexed with the new VDSO data. The 3rd party must now build a custom post-processor by linking with the raw2trace library.
Since the module list file is no longer completely human-readable and contains hidden custom fields, a new interface raw2trace_t::do_module_parsing() is added to support building 3rd-party module file parsing code for use after a trace is gathered.
Adds drmemtrace_get_output_path() for dynamically locating offline trace files.
Updates the burst_replace test to use the new methods.
Includes support for reading legacy trace module files that do not contain VDSO data (in such a case we revert to the prior behavior of skipping the ifetch entries). This is accomplished by using a version field in the module data. If it's missing, and if either the user parser is happy or the next field looks like a path, we assume everything's fine and we're just missing the vdso data. This legacy support was tested manually.