CoreValidation: Added -Wundef to GCC project configurations.

[cmsis] / CMSIS / CoreValidation / Tests / Cortex-M4FP / IAR / debug.eww

<?xml version="1.0" encoding="UTF-8"?>
<workspace>
    <project>
        <path>$WS_DIR$\debug.ewp</path>
    </project>
    <batchBuild />
</workspace>