RFR(XXS): A couple of type fixes in C1

[Igor Veresov]

I’d like to push a couple of tiny fixes of types in C1 that went unnoticed when porting to 64-bit.

8037140: C1: Incorrect argument type used for SharedRuntime::OSR_migration_end in LIRGenerator::do_Goto
8037149: C1: getThreadTemp should return a T_LONG register on 64bit

The fixes don’t really change the generated code since the only affect some reg-reg moves. However it’d be nice to improve the overall type hygiene.

Webrevs:
http://cr.openjdk.java.net/~iveresov/8037149/webrev.00/
http://cr.openjdk.java.net/~iveresov/8037140/webrev.00/

Thanks,
igor