kernel-headers: bump 3.{0, 4, 8}.x stable version and EOL 3.7.x series

The 3.7.x series is EOLed upstream so match that marking it as
deprecated.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>