Revert "Disable mac-host build."

This reverts commit a5fc101633a53a0f64c0899b97bbbebdc4020aa7.

Reason for revert: b/72988664

Bug: 72988664
Bug: 72618679
Change-Id: I11c431c0bf962d9224403f91df1292b8a3012af4
diff --git a/Android.bp b/Android.bp
index b89574b..fceccb9 100644
--- a/Android.bp
+++ b/Android.bp
@@ -38,7 +38,15 @@
             ],
         },
         darwin: {
-            enabled: false,
+            cflags: [
+                "-D_FILE_OFFSET_BITS=64",
+            ],
+            host_ldlibs: [
+                "-framework AppKit",
+                "-framework CoreFoundation",
+                "-framework Foundation",
+                "-framework Security",
+            ],
         },
     },
 }