Move libriscv to custom fork with stdin enabled

[lynzrand]

No description provided.

[peter-jerry-ye-code-review]

Observations and Suggestions

1. Git Submodule Update:

   • The URL for the libriscv submodule has been changed from https://github.com/fwsGonzo/libriscv to https://github.com/lynzrand/libriscv.git. This change should be carefully reviewed to ensure that the new repository is the correct and approved version. If not, it could lead to compatibility issues or introduce unverified code.

2. Submodule Commit Update:

   • The commit hash for the libriscv submodule has been updated from 8d2a318ef58e2e40524a28a1d7f6ec93a450af06 to e068ef93bae20b1220d02276ad3f03e383a44e16. It's crucial to verify that this new commit does not break any existing functionality or dependencies. Testing the build and functionality with the new submodule commit is advisable.

3. Consistency with Repository Standards:

   • Ensure that the new URL and commit adhere to your organization's repository standards and code review processes. If there are specific guidelines or approval processes for changing submodules, make sure they have been followed.

These observations are based on the provided git diff output and are meant to guide through the review process to ensure that the changes do not introduce any unintended issues.