fix: Use after free in tests
fix: Use after free in tests

The IonBinarySymbol.ReaderReadsSymbolValueZeroAsSID test frees the
reader it's using before it reads out the symbol table.

amznlabs/ion-c,amzn/ion-c,amzn/ion-c,amzn/ion-c,amzn/ion-c,amznlabs/ion-c,amznlabs/ion-c,amznlabs/ion-c