Fix Issue 10897 - btc, btr and bts shouldn't be safe
Merge pull request #596 from monarchdodra/bt

Fix Issue 10897 - btc, btr and bts shouldn't be safe
Add types for Linux/AArch64.

Only implementation of core.thread is missing.
Merge pull request #602 from redstar/aarch64

Add types for Linux/AArch64.