8183552: Move align functions to align.hpp
Reviewed-by: stuefe, pliden

8178500: Replace usages of round_to and round_down with align_up and align_down
Reviewed-by: rehn, tschatzl

8139906: assert(src->section_index_of(target) == CodeBuffer::SECT_NONE) failed: sanity
Summary: The card table address used in the g1_post_barrier_slow stub should not be marked as relocatable.
Reviewed-by: kvn

8140588: Internal Error: gc/g1/ptrQueue.hpp:126 assert(_index == _sz) failed: invariant: queues are empty when activated
Summary: Re-check queue active state before updating
Reviewed-by: pliden, kbarrett, mdoerr

8168503: JEP 297: Unified arm32/arm64 Port
Reviewed-by: kvn, enevill, ihse, dholmes, erikj, coleenp, cjplummer