Add udev_device_new_from_subsystem_sysname to udev, for use in Web MIDI on Linux

device/udev_linux/udev0_loader.cc

Index: device/udev_linux/udev0_loader.cc
diff --git a/device/udev_linux/udev0_loader.cc b/device/udev_linux/udev0_loader.cc
index d70b2f26cfbc16687a4ede02031d6af063222bb9..9b0276ca4bb8fbfe6a63e8c06acddc057e6b829a 100644
--- a/device/udev_linux/udev0_loader.cc
+++ b/device/udev_linux/udev0_loader.cc
@@ -70,6 +70,14 @@ udev_device* Udev0Loader::udev_device_new_from_devnum(udev* udev,
   return lib_loader_->udev_device_new_from_devnum(udev, type, devnum);
 }
 
+udev_device* Udev0Loader::udev_device_new_from_subsystem_sysname(
+    udev* udev,
+    const char* subsystem,
+    const char* sysname) {
+  return lib_loader_->udev_device_new_from_subsystem_sysname(
+      udev, subsystem, sysname);
+}
+
 udev_device* Udev0Loader::udev_device_new_from_syspath(udev* udev,
                                                        const char* syspath) {
   return lib_loader_->udev_device_new_from_syspath(udev, syspath);