8228469: (tz) Upgrade time-zone data to tzdata2019b Reviewed-by: naoto, martin

8229206: Shenandoah: ShenandoahWeakRoot::oops_do() uses wrong timing phase Reviewed-by: shade

8213031: (zipfs) Add support for POSIX file permissions Reviewed-by: alanb, lancea

8229016: C2 scalarization crashes with assert(node->Opcode() == Op_CastP2X) failed: ConvP2XNode required Summary: Detect array copy to self to avoid emitting another load to the to-be-removed allocation. Reviewed-by: kvn