Add pthread mutex initializer constants for riscv64

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Description

Adds constants

• PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP
• PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP
• PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP

for riscv64 target.

This could fix issue rust-lang/miri#4989.

Sources

https://sourceware.org/git/?p=glibc.git;a=blob;f=sysdeps/nptl/pthread.h;h=95c0eb7e0341a4a37ec9df767e80fa7245aee1ef;hb=HEAD#l90

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
  Blocked by libc-test ctest failed locally #5093.