#898 STM8 support

[Philipp Klaus Krause]

ChibiOS dropped STM8 support long ago. But the Sourceforge summary still lists STM8 as supported, so now when other websites report a neew ChibiOS release, tehy tend to pick up the wrong list of supported platforms from the summary.

Either the summary needs to be changed, or the STM8 support needs to be brought back (RFE #45).

Philipp