RFR(XXS): 8046684: sharedRuntime.cpp...assert(((nmethod*)cb)->is_at_poll_or_poll_return(pc)) failed: safepoint polling: type must be poll

[Igor Veresov]

A little bit of a fallout from 8031389 - we need to emit a reloc from the is_polling_page_far() on x86.

Webrev: http://cr.openjdk.java.net/~iveresov/8046684/webrev.00/

Thanks,
igor