Add Sega Mega Drive vectors table

[lab313ru]

It contains 64 dwords. First dword is SP value.

[wrigjl]

What do I need to change?

[lab313ru]

Here: https://github.com/lab313ru/smd_ida_tools/blob/055b8634774dbb0630b6a3da5ce5ce34146b1175/smd_loader7/smd_loader7.h#L28 you can find names for SegaMD vectors. Could you add it to the available vector tables selection dialog?

[wrigjl]

If you send a pull request, I can.