RFR (XS): 7144405: JumbleGC002 assert(m->offset() == pc_offset) failed: oopmap not found

[Roland Westrelin]

http://cr.openjdk.java.net/~roland/7140985/webrev.00/

A piece is missing from the change I made for 7119286. In StubGenerator::generate_throw_exception(), a pc that is not the pc at the call is stored in the thread last frame anchor but this pc is not used for the associated oopmap (the pc at the call is).

Roland.