Revert "osbuild: don't compress in the qemu stage for now"

This reverts commit 2a8d1e6.

After some further testing this might be what is causing the GRUB
failure mentioned in coreos/fedora-coreos-tracker#1667.
Let's revert to see if the rawhide pipeline failures clear up.

build.sh

@@ -191,7 +191,6 @@ patch_osbuild() {
         /usr/lib/coreos-assembler/0001-stages-zipl.inst-improve-kernel-initrd-path-resoluti.patch \
         /usr/lib/coreos-assembler/0002-stages-zipl.inst-support-appending-kernel-options.patch    \
         /usr/lib/coreos-assembler/0001-stages-copy-allow-copying-from-the-tree.patch              \
-        /usr/lib/coreos-assembler/0001-stages-qemu-don-t-use-internal-compression-for-now.patch   \
             | patch -d /usr/lib/osbuild -p1
 
     # And then move the files back; supermin appliance creation will need it back