Fix sw_emulated test

[secure12]

Description

The doc_test.go in sw_emulated was not passing. Fixed the curve being used in the circuit, the witness points (use the computed Q instead of the base point) and added expected outputs.

Fixes #888

Type of change

• Bug fix (non-breaking change which fixes an issue)

How has this been tested?

• go fmt
• go vet
• go test doc_test.go

How has this been benchmarked?

N/A

Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I did not modify files generated from templates
• golangci-lint does not output errors locally
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[CLAassistant]

All committers have signed the CLA.

[yelhousni]

👍