Update the package to the last release of the old 4.0 series.

Note that this version is still from the obsolete 4.0 series,
but updates the source base a bit.

This also enables dropping one of the GCC 7.3 fixes.

Compiled and briefly run-tested with ipq806x and mvebu,
but no actual operations done.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>