enable vm debug logs if app.vm_debug_logs is set to true

lib/motion/project/template/android.rb

@@ -170,6 +170,7 @@ EOS
   end
   payload_c_txt << <<EOS
 }
+extern bool ruby_vm_debug_logs;
 extern "C"
 jint
 JNI_OnLoad(JavaVM *vm, void *reserved)
@@ -180,6 +181,7 @@ JNI_OnLoad(JavaVM *vm, void *reserved)
 	return -1;
     }
     assert(env != NULL);
+    #{App.config.vm_debug_logs ? 'ruby_vm_debug_logs = true;' : ''}
     rb_vm_init("#{App.config.package_path}", "#{App.config.rubymotion_env_value}", "#{Motion::Version}", env);
     void *top_self = rb_vm_top_self();
 EOS

lib/motion/project/template/android/config.rb

@@ -97,6 +97,8 @@ module Motion; module Project;
       :logs_components, :version_code, :version_name, :permissions, :features,
       :services, :application_class, :manifest, :theme
 
+    attr_accessor :vm_debug_logs # Non-public.
+
     def initialize(project_dir, build_mode)
       super
       @main_activity = 'MainActivity'
@@ -114,6 +116,7 @@ module Motion; module Project;
       @version_name = '1.0'
       @application_class = nil
       @theme = "@android:style/Theme.Holo"
+      @vm_debug_logs = false
 
       @manifest = AndroidManifest.new
       construct_manifest