Update kernel headers with new parser.

Test: Builds.
Change-Id: I3f0714d53ac893ccc3e66f7a92d0ea7a6737f1c3
diff --git a/libc/kernel/uapi/drm/drm_mode.h b/libc/kernel/uapi/drm/drm_mode.h
index 06c26e4..dff9f34 100644
--- a/libc/kernel/uapi/drm/drm_mode.h
+++ b/libc/kernel/uapi/drm/drm_mode.h
@@ -20,6 +20,7 @@
 #define _DRM_MODE_H
 #include "drm.h"
 #ifdef __cplusplus
+extern "C" {
 #endif
 #define DRM_DISPLAY_INFO_LEN 32
 #define DRM_CONNECTOR_NAME_LEN 32
@@ -463,5 +464,6 @@
   __u32 lessee_id;
 };
 #ifdef __cplusplus
+}
 #endif
 #endif