Add RelocInfo::DEBUG_BREAK_SLOT to RelocInfo::kApplyMask on ia32/x64 to ensure that debug break slots get relocated correctly during compacting GC.

Review URL: http://codereview.chromium.org/3058048

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5178 ce2b1a6d-e550-0410-aec6-3dcde31c8c00