RFR: 8244607: 8244550 broke non-PCH debug builds

[Claes Redestad]

Hi,

I thought I had purged PCH, but not for fastdebug. Combine that with
looking at the wrong test job before push and it seems I broke some
builds - again.

Fix: outline the RM and exception throwing from the now-inlined
allocate_instance, since ResourceMark constructor is defined in
.cpp and not .hpp on ASSERT-enabled builds:

http://cr.openjdk.java.net/~redestad/8244607/open.00/

Testing: yes.

/Claes