Revert "Add mkbootfs to build-tools"

This reverts commit 05274b3a78067754014c4f32104ed244599eaf39.

Reason for revert: aosp/1696927 add mkbootfs to kernel build tools instead, as this tool is only used in the kernel tree.

Change-Id: I46035926edd30cb66d96cb010a229a1ca681f1b0
1 file changed