+ DISTCLEAN= macro for skipping kernel distclean on configure playing

Signed-off-by: Dmitry Ponyatov <dponyatov@gmail.com>
* large kernel config option enabling for keneric & i386 arch
+ disk drives & filesystems
+ usb disks & webcams
+ sdhc/mmc cards & reader controllers
+ RTC clock config
+ qemu/sound drivers
+ i10n for kernel


Signed-off-by: Dmitry Ponyatov <dponyatov@gmail.com>