recovery: fix yaffs2 backup/restore
recovery: fix yaffs2 backup/restore

we need to be in the directory we want to backup, not the parent
directory

Patchset 2: fix filename of yaffs2 image

Change-Id: Ibf9576bc93d5b61c5f8608212bf68de05d5eb4a4

DerTeufel/dualboot_recovery,76Demented/bootable_recovery-,randomblame/bootable_recovery,randomblame/bootable_recovery,kylinmoddev/android_bootable_recovery,76Demented/bootable_recovery-,76Demented/bootable_recovery-,InsomniaAOSP/platform_bootable_recovery,DerTeufel/dualboot_recovery,kylinmoddev/android_bootable_recovery,InsomniaAOSP/platform_bootable_recovery,kylinmoddev/android_bootable_recovery,DerTeufel/dualboot_recovery,InsomniaAOSP/platform_bootable_recovery,kylinmoddev/android_bootable_recovery,InsomniaAOSP/platform_bootable_recovery,Plain-Andy/android_platform_bootable_recovery,randomblame/bootable_recovery,randomblame/bootable_recovery,76Demented/bootable_recovery-,Plain-Andy/android_platform_bootable_recovery,Plain-Andy/android_platform_bootable_recovery,randomblame/bootable_recovery,Plain-Andy/android_platform_bootable_recovery,InsomniaAOSP/platform_bootable_recovery,DerTeufel/dualboot_recovery,DerTeufel/dualboot_recovery,76Demented/bootable_recovery-