nandroid: backup: save recovery log
nandroid: backup: save recovery log

Change-Id: Id9e73317a6b46ddc0ec0c3005bfc9ef55cf7bf0d

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