zypper-minimal: Don't get confused by etc/resolv.conf symlink

Newer openSUSE distributions install an absolute link to /run/netconfig
as /etc/resolv.conf in $TARGET_ROOT. as that points outside
TARGET_ROOT, we unintentionally wipe the system resolv.conf here
and break our ability to finish building the image.

Change-Id: I9d5aaa9fad2f81dcabfe19e2f1e6b6e50af597d7

diskimage_builder/elements/zypper-minimal/root.d/08-zypper-chroot

@@ -101,6 +101,11 @@ sudo zypper ${ZYPPER_TARGET_OPTS} install \
     ${DIB_OPENSUSE_PATTERNS} ${ZYPPER_INSTALL_SYSTEM_PYTHON} \
     zypper sudo ca-certificates-mozilla
 
+# Remove the installed symlink, otherwise we wipe the resolv.conf
+# outside the target_root (as the link is not relative)
+# outside target_root
+test -L $TARGET_ROOT/etc/resolv.conf && sudo rm -f $TARGET_ROOT/etc/resolv.conf
+
 # Put in a dummy /etc/resolv.conf over the temporary one we used
 # to bootstrap.  systemd has a bug/feature [1] that it will assume
 # you want systemd-networkd as the network manager and create a