The mini root filesystem for -current has been updated:
ftp://ftp.arm.slackware.com/slackwarearm/slackwarearm-devtools/minirootfs/

• a/aaa_elflibs-14.2-arm-10.txz
  Added libatomic, and updated versions of libcurl, libexpat, libglib-2.0,
  libgmodule-2.0, libgobject-2.0, libgthread-2.0, libidn2, libmpfr, and
  libpng16.

• x/libdrm-2.4.87-arm-1.txz
• x/mesa-17.2.4-arm-1.txz