synlig crashes on initialization when linked statically to Yosys

If the module is not linked dynamically, there can be an initialization-fiasco type crash when registering the edif modle.

https://github.com/chipsalliance/synlig/commit/5e1a7ccfa23a56639223ad2840fbd15519679cf8#r131191626

Calling that register function at a time the external variable is not initailized yet is problematic. This should probably be deferred.

Review the linked commit and the EDIF module registration function mentioned in the report. Reproduce initialization with a statically linked Yosys build, then verify that registration no longer accesses an uninitialized external variable and that startup completes successfully.

Written by the indexing model from the issue text.