bugfix: for some reason Debian Jessie failes to mount on first try.. give it 5 seconds and try again...

Signed-off-by: Robert Nelson <robertcnelson@gmail.com>

mk_mmc.sh

@@ -988,7 +988,15 @@ populate_boot () {
 		mkdir -p ${TEMPDIR}/disk
 	fi
 
+	#FIXME for some reason debian jessie, this failes now...
 	partprobe ${media}
+	if ! mount -t ${mount_partition_format} ${media_prefix}${media_boot_partition} ${TEMPDIR}/disk; then
+
+	echo "Mount Failure, trying 2nd time in 5 seconds..."
+	partprobe ${media}
+	sync
+	sleep 5
+
 		if ! mount -t ${mount_partition_format} ${media_prefix}${media_boot_partition} ${TEMPDIR}/disk; then
 			echo "-----------------------------"
 			echo "Unable to mount ${media_prefix}${media_boot_partition} at ${TEMPDIR}/disk to complete populating Boot Partition"
@@ -996,6 +1004,7 @@ populate_boot () {
 			echo "-----------------------------"
 			exit
 		fi
+	fi
 
 	mkdir -p ${TEMPDIR}/disk/backup || true
 	mkdir -p ${TEMPDIR}/disk/boot/dtbs/current/ || true