common/container/noextract.conf: add /etc/{hosts,mtab}

fixes issues with running updates that contain base-files, as docker
read-only mounts over of these files. this causes xbps to error when
trying to extract these files.

common/container/noextract.conf

@@ -1,6 +1,8 @@
 noextract=/etc/sv*
 noextract=/usr/share/man*
 noextract=/usr/lib/dracut*
+noextract=/etc/hosts
+noextract=/etc/mtab
 noextract=/etc/skel*
 noextract=/usr/lib/modprobe.d*
 noextract=/usr/lib/sysctl.d*