* gnu/packages/patches/qemu-CVE-2017-8112.patch, gnu/packages/patches/qemu-CVE-2017-8309.patch, gnu/packages/patches/qemu-CVE-2017-8379.patch, gnu/packages/patches/qemu-CVE-2017-8380.patch: New files. * gnu/local.mk (dist_patch_DATA): Add them. * gnu/packages/qemu.scm (qemu)[source]: Use them.