Use 64 bits arithmetics for array address computation instead of 32

[hpcharles]

Activation of 32 bits arithmetic in aarch64 triggered a bug in Array addresse computation for CodeExamples/ArrayXXX

This is due to the use of 32 bits add instead of 64 bits which lead to a memory fault because the address is cut at 32 bits.

[hpcharles]

Corrected for aarch64 in commit #a26e1d62de9162468aa620836d81eff71d75797f
To be investigated for riscv / power

[hpcharles]

Corrected in #4d12480 for power & riscv