Update kernel headers with new parser.

Test: Builds.
Change-Id: I3f0714d53ac893ccc3e66f7a92d0ea7a6737f1c3
diff --git a/libc/kernel/uapi/drm/exynos_drm.h b/libc/kernel/uapi/drm/exynos_drm.h
index 8b27cbb..4918035 100644
--- a/libc/kernel/uapi/drm/exynos_drm.h
+++ b/libc/kernel/uapi/drm/exynos_drm.h
@@ -20,6 +20,7 @@
 #define _UAPI_EXYNOS_DRM_H_
 #include "drm.h"
 #ifdef __cplusplus
+extern "C" {
 #endif
 struct drm_exynos_gem_create {
   __u64 size;
@@ -225,5 +226,6 @@
   __u64 reserved;
 };
 #ifdef __cplusplus
+}
 #endif
 #endif