ARM64: Introduce a version of ADR handling distant targets.

This fixes an out-of-range label error for an ADR instruction in the
mozilla/data/js1_5/Regress/regress-280769-2.js test.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/222433002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20545 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Handlify ten allocator functions from the Heap.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/227623002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20546 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/bleeding_edge' into bleeding_edge