package/kmsxx: bump version for portability fix with musl

Bump the version to get two portability patches (as well as a small,
innocuously-looking minor feature).

Fixes:
    http://autobuild.buildroot.net/results/682/68266cb5b26a62387dc99aef31fc9654c8fcd505/


    [and quite a few others...]

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>