RFR: 8236242: Arm32: build broken after 8234794

[Nick Gasson]

Hi,

Please review this fix to the build on Arm32 (and probably x86_32) after 
my changes in 8234794.

Bug: https://bugs.openjdk.java.net/browse/JDK-8236242
Webrev: http://cr.openjdk.java.net/~ngasson/8236242/webrev.1/

The two functions I added were in a #ifdef _LP64 block but they can be 
called from MetaspaceShared on 32-bit platforms. Moved them after the 
_LP64 block.

Tested by building on 32/64-bit Arm and x86_64.


Thanks,
Nick