Align functionality of Z3 in Python and C++

[hanyuone]

The output of printExprValues in the Python version is slightly different to the one in the C++ version. Previously, the Python version would output something like this:

-----------SVFVar and Value-----------
ObjVar2 (0x2)                  Value: NULL
ObjVar3 (0x3)                  Value: NULL
ObjVar5 (0x5)                  Value: NULL
ObjVar9 (0x9)                  Value: NULL
ObjVar12 (0xc)                 Value: NULL
ObjVar15 (0xf)                 Value: NULL
ValVar0()                      Value: 2
ValVar1()                      Value: 2
ValVar4(main)                  Value: 0x7f000005
ValVar7(cmp)                   Value: 1
ValVar8()                      Value: 3
ValVar11(svf_assert)           Value: 0x7f00000c
ValVar14()                     Value: 0
-----------------------------------------

When in the C++ version, the address next to each ObjVar would be & addressMask, being something like ObjVar2 (0x7f000002). This PR aligns both outputs.

Tested on dryrun cases, confirmed that the outputs for both C++ and Python for printExprValues are the same.