This austensibly helps fastboot on a mac

Change-Id: I0ee592f9d5e8f4258af1bc764e62aad4eae51315
diff --git a/flash.sh b/flash.sh
index fe84805..ff316ed 100755
--- a/flash.sh
+++ b/flash.sh
@@ -69,10 +69,12 @@
 # Flash bootloader
 ${FASTBOOT_CMD} flash bootloader0 ${PRODUCT_OUT}/u-boot.imx
 ${FASTBOOT_CMD} reboot-bootloader
+sleep 3
 
 # Flash partition table
 ${FASTBOOT_CMD} flash gpt ${PRODUCT_OUT}/${PART_IMAGE}
 ${FASTBOOT_CMD} reboot-bootloader
+sleep 3
 
 # Flash filesystems
 ${FASTBOOT_CMD} erase misc