Build on Mac too.

Bug: 25841205
Change-Id: Iaeb5f589c02abcd88c8886eb68fc72f4ab550bf8
diff --git a/Android.mk b/Android.mk
index f6aaac9..178cb8a 100644
--- a/Android.mk
+++ b/Android.mk
@@ -14,9 +14,4 @@
 # limitations under the License.
 #
 
-# libbrillo is only built for Linux, so this package is too.
-ifeq ($(HOST_OS),linux)
-
 include $(call all-subdir-makefiles)
-
-endif  # HOST_OS == linux