update libg

[aparajit-pratap]

Purpose

Update libg. Includes:

• NURBS curve approximation fixes
• Localization support for obsolete node warnings
• Fixes to PolyCurve Normal

Needs cherry-picking to RC 2.17 branch.

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated

Release Notes

• NURBS curve approximation fixes
• Localization support for obsolete node warnings
• Fixes to PolyCurve Normal

FYIs

(FILL ME IN, Optional) Names of anyone else you wish to be notified of

[aparajit-pratap]

Passes here: https://master-5.jenkins.autodesk.com/job/Dynamo/job/DynamoSelfServe/job/pullRequestValidation/7851/
Merging.