Allocate the patcher object on the heap, to avoid occasional stack
overflows on QNX/ARM when entering GetNoCodeAgeSequence.

BUG=v8:3111
LOG=y

Patch from Cosmin Truta <ctruta@blackberry.com>.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/144933002

Patch from Cosmin Truta <ctruta@blackberry.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18815 ce2b1a6d-e550-0410-aec6-3dcde31c8c00