8183552: Move align functions to align.hppReviewed-by: stuefe, pliden
8178500: Replace usages of round_to and round_down with align_up and align_downReviewed-by: rehn, tschatzl
8168503: JEP 297: Unified arm32/arm64 PortReviewed-by: kvn, enevill, ihse, dholmes, erikj, coleenp, cjplummer