Disable oatdumps device build

oatdumps is only supposed to build for the host.

Test: mmma -j art
Change-Id: Ie3ce9dd8340bfc226e7f3125491875f9c18b388a
diff --git a/oatdump/Android.bp b/oatdump/Android.bp
index ff56ea5..dd6331c 100644
--- a/oatdump/Android.bp
+++ b/oatdump/Android.bp
@@ -53,6 +53,7 @@
 art_cc_binary {
     name: "oatdumps",
     defaults: ["oatdump-defaults"],
+    device_supported: false,
     target: {
         darwin: {
             enabled: false,
@@ -73,6 +74,7 @@
         "art_debug_defaults",
         "oatdump-defaults",
     ],
+    device_supported: false,
     target: {
         darwin: {
             enabled: false,