Add V8_ALIGNAS() and V8_ALIGNOF() and use that in lazy-instance.h.
This renames the existing V8_ALIGNAS() to V8_ALIGNED(), and introduces
V8_ALIGNAS(type, alignment) which aligns according to the type and falls
back to aligning according to alignment.
Also use __attribute__((aligned(n))) instead of __attribute__((__aligned__(n))).
R=svenpanne@chromium.org
Review URL: https://codereview.chromium.org/
22999052
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16318
ce2b1a6d-e550-0410-aec6-
3dcde31c8c00