Use bundled recovery.bin instead of recovery partition.

Provide a minimal, reduced defconfig version [1] of the stock kernel
to act as a decoy recovery with the sole purpose of resetting the
bootmode param.

[1]: https://github.com/bbelos/YP-G1_GB_Kernel

Change-Id: Ic449280b16522cf7053f95837df3b2b3803d3360