package/busybox: fix build with musl 1.2.0

package/busybox: fix build with musl 1.2.0

Busybox 1.31.1 fails to build with musl 1.2.0 due to the direct use of
__NR_clock_gettime. Pull four patches already applied upstream to fix
the problem.

The patches were rebased to version 1.31.1 to minimize the change, since
the original ones depended on a previous commit which is not worthwhile
to pick.

Fixes:
  http://autobuild.buildroot.net/results/f45f91aea6deee6699eabdfa618ac44873b8da51/

Signed-off-by: Evgeniy Didin <Evgeniy.Didin@synopsys.com>
Signed-off-by: Carlos Santos <unixmania@gmail.com>
Cc: Romain Naour <romain.naour@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Yann E. MORIN. <yann.morin.1998@free.fr>
Cc: arc-buildroot@synopsys.com
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>