Fix strict aliasing violations

[heshpdx]

The cast to char** is a violation of strict aliasing rules. Compilers may generate incorrect code due to this issue. Using memcpy to avoid the issue. Not expecting perf difference.

This was found via testing in SPEC CPU's 729.abc_r.

[cmuellner]

PMemAlign is initialized to zero at this point, so this is incorrect.
That's likely also the reason why the CI is failing.

The strict-aliasing issues are only in the type-punning accesses:

*((Hop_Obj_t **)pTemp)
*((char **)pMemory)

The surrounding allocation/alignment code can and should stay the same.

Proposed change:

 char * pMemory;
 Hop_Obj_t * pEntry, * pNext;
 ...
 pMemory = ABC_ALLOC( char, nBytes );
 Vec_PtrPush( p->vChunks, pMemory );

 pMemory = pMemory + 64 - (((int)(ABC_PTRUINT_T)pMemory) & 63);
 Vec_PtrPush( p->vPages, pMemory );

 pEntry = (Hop_Obj_t *)pMemory;
 p->pListFree = pEntry;
 for ( i = 1; i <= IVY_PAGE_MASK; i++ )
 {
     pNext = pEntry + 1;
     memcpy( pEntry, &pNext, sizeof(Hop_Obj_t *) );
     pEntry++;
 }
 pNext = NULL;
 memcpy( pEntry, &pNext, sizeof(Hop_Obj_t *) );