Changes

Fix trace format for MemorySubSpace

Various trace points use %llx (long long - 64bit) while it should use
%zx or %p (size_t - 32/64 bit) format to print MemorySubSpace addresses
and allocation result (address in heap), what would work both for 32bit
and 64bit VMs. Settling with %p, since it's already predominant.

Signed-off-by: Aleksandar Micic <Aleksandar_Micic@ca.ibm.com>
 (commit: de2d500)