add lint ignore for newApi within build dir

Signed-off-by: tobiasKaminsky <tobias@kaminsky.me>

lint.xml

@@ -51,4 +51,8 @@
     <issue id="RestrictedApi" severity="error">
         <ignore path="build" />
     </issue>
+
+    <issue id="NewApi" severity="error">
+        <ignore path="build" />
+    </issue>
 </lint>