Update kernel headers with new parser.

Test: Builds.
Change-Id: I3f0714d53ac893ccc3e66f7a92d0ea7a6737f1c3
diff --git a/libc/kernel/uapi/drm/v3d_drm.h b/libc/kernel/uapi/drm/v3d_drm.h
index c3e58cb..8865911 100644
--- a/libc/kernel/uapi/drm/v3d_drm.h
+++ b/libc/kernel/uapi/drm/v3d_drm.h
@@ -20,6 +20,7 @@
 #define _V3D_DRM_H_
 #include "drm.h"
 #ifdef __cplusplus
+extern "C" {
 #endif
 #define DRM_V3D_SUBMIT_CL 0x00
 #define DRM_V3D_WAIT_BO 0x01
@@ -83,5 +84,6 @@
   __u32 offset;
 };
 #ifdef __cplusplus
+}
 #endif
 #endif