A separate package which depdens on msmtp and nail is introduced.
Once more packages provide `sendmail` and `mail` interfaces, this
dependency can be made more flexible.

Signed-off-by: Maxim Storchak <m.storchak@gmail.com>

By default the database of the known drives is compiled into smartctl and smartd.
These tools also support loading external database from /usr/share/smartmontools/drivedb.h.
This changeset splits moves the database to a separate package
which allows to save some flash space and RAM for those for whom
generic S.M.A.R.T. attributes are enough.

Signed-off-by: Maxim Storchak <m.storchak@gmail.com>

Removed weird uclibc++ compatibility stuff as it seems to not be needed
anymore.

Switched to standard variables.

Added PKG_BUILD_PARALLEL for faster compilation.

Removed PKG_FIXUP as it seems the package has been fixed already.

A few changes to the CFLAGS and linker options resulted in ipk size going
from 244694 to 244283, possibly due to previous overlinking.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Signed-off-by: Maxim Storchak <m.storchak@gmail.com>