Add CLONE_CLEAR_SIGHAND and CLONE_INTO_CGROUP for Android

[chriswailes]

Description

Add CLONE_CLEAR_SIGHAND and CLONE_INTO_CGROUP to the Android module.

Sources

uapi/linux/sched.h

Checklist

• Relevant tests in libc-test/semver have been updated
• No placeholder or unstable values like *LAST or *MAX are
  included (see #3131)
• Tested locally (cd libc-test && cargo test --target mytarget);
  especially relevant for platforms that may not be checked in CI

[rustbot]

Some changes occurred in the Android module

cc @maurer

[tgross35]

Thanks!