initscripts/sysfs.sh: mount debugfs if present

debugfs is another kernel virtual file system that should be mounted
if configured, so if it's configured into the kernel, mount it.

(From OE-Core rev: 55c4d3c55e4c3a7c2cda6d006cf7b78567bd3298)

Signed-off-by: Tom Zanussi <tom.zanussi@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/initscripts/initscripts-1.0/sysfs.sh

@@ -17,3 +17,7 @@ fi
 if [ -e /sys ] && grep -q sysfs /proc/filesystems && ! [ -e /sys/class ]; then
   mount -t sysfs sysfs /sys
 fi
+
+if [ -e /sys/kernel/debug ] && grep -q debugfs /proc/filesystems; then
+  mount -t debugfs debugfs /sys/kernel/debug
+fi