[fbgemm_gpu] Build script enhancements

[q10]

• Script enhancements for installing compiler toolchains (leftover from D60430228)

[netlify[bot]]

✅ Deploy Preview for pytorch-fbgemm-docs ready!

Name	Link
🔨 Latest commit	f85cf623c4f17671808a7be0bd964ebafeaab7f1
🔍 Latest deploy log	https://app.netlify.com/sites/pytorch-fbgemm-docs/deploys/66bd03c6c94db2000803ef61
😎 Deploy Preview	https://deploy-preview-2982--pytorch-fbgemm-docs.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[facebook-github-bot]

@q10 has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[facebook-github-bot]

@q10 has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[facebook-github-bot]

@q10 merged this pull request in pytorch/FBGEMM@fffabf63a1d88314f9111e3055d95b1461d2f2de.