manifest: Fix qemu-kernel clone depth
manifest: Fix qemu-kernel clone depth

Needed when using referenced environments

Change-Id: Idba847c0dd00cfb6e343e800d754c7e507c11794

ND-3500/platform_manifest,hagar006/platform_manifest,Hybrid-Power/startsync,fallouttester/platform_manifest,knone1/platform_manifest,RR-msm7x30/platform_manifest,see4ri/lolili,pranav01/platform_manifest