am c05d0000: Only turn host build on for linux

Merge commit 'c05d0000bb3e91a21c2cc7cbd85232f1afc7a8d2' into gingerbread-plus-aosp

* commit 'c05d0000bb3e91a21c2cc7cbd85232f1afc7a8d2':
  Only turn host build on for linux