build-fast: Fix removal of previous builds
I intended there to be just one so e.g. one can just glob `*.qcow2`
to find the latest.
@@ -105,7 +105,7 @@ if [ -z "${projectdir}" ]; then
fi
imgname="${fastref}-${version}-qemu.qcow2"
# Prune previous images
-rm -vf ${outdir}/fastbuild-*.qcow2
+rm -vf ${outdir}/*.qcow2
qemu-img create -f qcow2 -o backing_fmt=qcow2,backing_file="${previous_builddir}/${previous_qemu}" "${imgname}.tmp" 20G
RUNVM_NONET=1 runvm -drive if=virtio,id=target,format=qcow2,file="${imgname}.tmp",cache=unsafe -- \
/usr/lib/coreos-assembler/offline-update-impl "${workdir}/tmp/repo" "${commit}"
