udev-extraconf: Avoid slashes in mountpoint names

Devices with labels such as "Hello/World/Foo/Bar" cause mount.sh to
create the directory structure @MOUNT_BASE@/Hello/World/Foo/Bar. The
partition is mounted to the nested "Bar" directory. On device removal,
the directory structure is not cleaned up.

This commit replaces all forward slashes in partition labels by
underscores to avoid this edge case.

(From OE-Core rev: aa071e2f44b9f76883a7c316ea79c60ae3824d6c)

Signed-off-by: Robert Tiemann <rtie@gmx.de>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/udev/udev-extraconf/mount.sh

@@ -178,7 +178,7 @@ rm_dir() {
 
 get_label_name() {
 	# Get the LABEL or PARTLABEL
-	LABEL=`/sbin/blkid "$1" | grep -o 'LABEL=".*"' | cut -d '"' -f2`
+	LABEL=`/sbin/blkid "$1" | grep -o 'LABEL=".*"' | cut -d '"' -f2 | sed 's,/,_,g'`
 	# If the $DEVNAME has a LABEL or a PARTLABEL
 	if [ -n "$LABEL" ]; then
 	        # Set the mount location dir name to LABEL appended