Partially address #282 - allow statically linked wasm modules

[shravanrn]

This small change allows the first step in allowing use of statically linked wasm modules - allow use of symbols from the current binary. This works only if

1. There is only one wasm module statically linked
2. The application is compiled with "rdynamic" linker flag

I built this on another PR (for optionally excluding minisign) which modifies similar code so that there won't be merge conflicts. So please ignore the "combined diff of the 2 PRs/commits" and only see the diff of the one commit for this change.

[pchickey]

This PR was closed as a byproduct of deleting the branch named master. If this is still an active PR, re-open as a new PR against main.