Revert "Disable mac-host build."

This reverts commit a5fc101633a53a0f64c0899b97bbbebdc4020aa7.

Reason for revert: b/72988664

Bug: 72988664
Bug: 72618679
Change-Id: I11c431c0bf962d9224403f91df1292b8a3012af4
1 file changed