Fix: test weak-hidden symbols

Fix: test weak-hidden symbols

On many architectures (arm32, arm64, powerpc64) gcc chooses to assign
different addresses to weak-hidden symbols from different compile units
within the same module.

This is unfortunate, but still OK with respect to tracepoints.

The real issue is on 32-bit powerpc, where gcc (in O1 or more) assigns
different addresses only for objects larger than 8 bytes, but same
addresses for objects of 8 bytes or less (int and pointers).

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>