Don't enable LTO on host

We don't care about performance that much on host, turning LTO
optimization off saves some build time.

Test: presubmit
Change-Id: Ia02d76fc42c04c9833ba4a673c8ccf37a0ee70a9

Author: kongy

libs/binder/Android.bp

@@ -159,6 +159,11 @@ cc_defaults {
                 "UtilsHost.cpp",
             ],
         },
+        android: {
+            lto: {
+                 thin: true,
+            },
+        },
     },
 
     aidl: {
@@ -219,9 +224,6 @@ cc_defaults {
         "-performance-move-const-arg", // b/273486801
         "portability*",
     ],
-    lto: {
-        thin: true,
-    },
 }
 
 cc_library_headers {