Build libsparse and simg2img for Mac OS X as part of Cuttlefish launcher tools

Bug: 288493595
Test: m libsparse simg2img
Change-Id: I9e0c5c77b9b2b5994bf52e1ca9fdb84bc1523d5d
diff --git a/libsparse/Android.bp b/libsparse/Android.bp
index 8e83e16..5a7d0fc 100644
--- a/libsparse/Android.bp
+++ b/libsparse/Android.bp
@@ -28,6 +28,9 @@
         "libbase",
     ],
     target: {
+        darwin: {
+            enabled: true,
+        },
         windows: {
             enabled: true,
         },
@@ -52,6 +55,11 @@
     ],
 
     cflags: ["-Werror"],
+    target: {
+        darwin: {
+            enabled: true,
+        },
+    },
 }
 
 cc_binary {