Update kernel headers with new parser.

Test: Builds.
Change-Id: I3f0714d53ac893ccc3e66f7a92d0ea7a6737f1c3
diff --git a/libc/kernel/uapi/drm/via_drm.h b/libc/kernel/uapi/drm/via_drm.h
index fd4948d..9ef645a 100644
--- a/libc/kernel/uapi/drm/via_drm.h
+++ b/libc/kernel/uapi/drm/via_drm.h
@@ -20,6 +20,7 @@
 #define _VIA_DRM_H_
 #include "drm.h"
 #ifdef __cplusplus
+extern "C" {
 #endif
 #ifndef _VIA_DEFINES_
 #define _VIA_DEFINES_
@@ -196,5 +197,6 @@
   drm_via_blitsync_t sync;
 } drm_via_dmablit_t;
 #ifdef __cplusplus
+}
 #endif
 #endif