NuttX: add pthread_[get/set]name_np functions

[YohDeadfall]

Description

The pull request adds pthread_getname_np and pthred_setname_np functions to NuttX as they are supported since version 10.3.0.

Sources

The commit which added it to NuttX: apache/nuttx@4ee5ff8

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

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