Use the static-host/dynamic-device idiom for the erofs tools.

This is what f2fs and others already do, and takes mkfs.erofs
from being one of the largest binaries in /system/bin to merely
average.

Before:
  194K dump.erofs
  177K fsck.erofs
  760K mkfs.erofs

After: 96K dump.erofs
   88K fsck.erofs
  248K mkfs.erofs
Change-Id: Ibb2b082e483327cf36747e15019380bfd759f6db
1 file changed