fixfiles: do not exclude /dev and /run in -C mode

I can't think of a good reason why they should be excluded. On the
contrary, excluding them can cause trouble very easily if some labeling
rules for these directories change. For example, we changed the label
for /dev/nvme* from nvme_device_t to fixed_disk_device_t in Fedora
(updating the allow rules accordingly) and after policy update they
ended up with an invalid context, causing denials.

Thus, remove /dev and /run from the excludes. While there, also add
/root to the basic excludes to match the regex that excludes fc rules
(that should be effectively no functional change).

I did a sanity check on my system by running `restorecon -nv /dev /run`
and it didn't report any label differences.

Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Acked-by: Petr Lautrbach <plautrba@redhat.com>

policycoreutils/scripts/fixfiles

@@ -162,7 +162,7 @@ newer() {
 #
 diff_filecontext() {
 EXCLUDEDIRS="`exclude_dirs_from_relabelling`"
-for i in /sys /proc /dev /run /mnt /var/tmp /var/lib/BackupPC /home /tmp /dev; do
+for i in /sys /proc /mnt /var/tmp /var/lib/BackupPC /home /root /tmp; do
     [ -e $i ]  && EXCLUDEDIRS="${EXCLUDEDIRS} -e $i";
 done
 LogExcluded
@@ -175,7 +175,7 @@ if [ -f ${PREFC} -a -x /usr/bin/diff ]; then
 	sed -r -e 's,:s0, ,g' $FC | sort -u | \
 	/usr/bin/diff -b ${PREFCTEMPFILE} - | \
 	    grep '^[<>]'|cut -c3-| grep ^/ | \
-	    egrep -v '(^/home|^/root|^/tmp|^/dev)' |\
+	    egrep -v '(^/home|^/root|^/tmp)' |\
 	sed -r -e 's,[[:blank:]].*,,g' \
 	       -e 's|\(([/[:alnum:]]+)\)\?|{\1,}|g' \
 	       -e 's|([/[:alnum:]])\?|{\1,}|g' \