MFV: xz-embedded 3f438e15109229bb14ab45f285f4bff5412a9542 MFC after: 2 weeks
MFV r262756: Import xz-embedded from git. This is from commit hash '6a8a2364434763a033781f6b2a605ace9a021013'. This makes it possible to use CRC64 but for now it's intentionally not added to build.