[automerger skipped] Block and wait for /dev/block/loop<N> to appear in case it was created asynchronously. am: 5ba8aeaa80 -s ours

am skip reason: Change-Id Id8616804bba622226ca21b8eff0d3eb577b4b7e0 with SHA-1 1dd5c4f787 is in history

Change-Id: I30e748f7983e661ba2abd9bbd2ec12dc453b1eb1