correct PATH in overlay scripts

recipes-diya/diya-overlay/files/boot-to-recovery

@@ -6,6 +6,7 @@ if [[ $(/usr/bin/id -u) -ne 0 ]]; then
 fi
 
 . /etc/profile
+PATH=/sbin:/bin:/usr/sbin:/usr/bin
 
 if [ ! -e /boot/diya-config.txt ]; then
     # prepare env for recovery boot

recipes-diya/diya-overlay/files/confd

@@ -1,9 +1,9 @@
 #!/bin/sh
 
-PATH=/sbin:/bin:/usr/sbin:/usr/bin
 DESC="Auto deployment configuration from media"
 
 . /etc/profile
+PATH=/sbin:/bin:/usr/sbin:/usr/bin
 
 if [ -z "$DISK" ]; then
     DISK="mmcblk0"

recipes-diya/diya-overlay/files/expandfs.sh

@@ -1,5 +1,6 @@
 #! /bin/sh
 . /etc/profile
+PATH=/sbin:/bin:/usr/sbin:/usr/bin
 
 if [ -z "$DISK" ]; then
     DISK="mmcblk0"