Update kernel headers with new parser.

Test: Builds.
Change-Id: I3f0714d53ac893ccc3e66f7a92d0ea7a6737f1c3
diff --git a/libc/kernel/uapi/drm/savage_drm.h b/libc/kernel/uapi/drm/savage_drm.h
index 8c5a172..ae87d21 100644
--- a/libc/kernel/uapi/drm/savage_drm.h
+++ b/libc/kernel/uapi/drm/savage_drm.h
@@ -20,6 +20,7 @@
 #define __SAVAGE_DRM_H__
 #include "drm.h"
 #ifdef __cplusplus
+extern "C" {
 #endif
 #ifndef __SAVAGE_SAREA_DEFINES__
 #define __SAVAGE_SAREA_DEFINES__
@@ -151,5 +152,6 @@
   } clear1;
 };
 #ifdef __cplusplus
+}
 #endif
 #endif