Revert "Revert "Disable mac-host build.""

This reverts commit f7ab4b45881660bfeca478ec05f760a25daa51a9.

Reason for revert: The fix was landed,
https://android-review.googlesource.com/c/platform/external/libbrillo/+/609666,
actually before this revert.
One build on master has the fix but doesn't this revert, which successfully passed. So, now we can safely reland this.

Change-Id: I06654f16397dcd6a65d349bafc3c8e9180f88a9d
1 file changed