Create a host target for libdng_sdk

This is required for building a version of layoutlib using skia as its
renderer.
This is disabled on macOs because libjpeg is not available on that
platform.

Test: sdk build
Change-Id: Ib81956df0171da2ac8be70683f8a9b9725ffe49d
diff --git a/Android.bp b/Android.bp
index 13bbf9f..ac01a1c 100644
--- a/Android.bp
+++ b/Android.bp
@@ -101,6 +101,7 @@
 
 cc_library{
     name: "libdng_sdk",
+    host_supported: true,
     vendor_available: true,
     defaults: ["libdng_sdk-defaults"],
 
@@ -111,6 +112,16 @@
         "libjpeg",
     ],
 
+    target: {
+        host: {
+            static_libs: ["libcompiler_rt-extras"],
+        },
+        darwin: {
+            // TODO(b/67474260) Turn this back on
+            enabled: false,
+        },
+    },
+
     export_include_dirs: ["source"],
 }