Update kernel headers with new parser.

Test: Builds.
Change-Id: I3f0714d53ac893ccc3e66f7a92d0ea7a6737f1c3
diff --git a/libc/kernel/uapi/drm/drm.h b/libc/kernel/uapi/drm/drm.h
index 21f23f4..ef64ed7 100644
--- a/libc/kernel/uapi/drm/drm.h
+++ b/libc/kernel/uapi/drm/drm.h
@@ -37,6 +37,7 @@
 typedef unsigned long drm_handle_t;
 #endif
 #ifdef __cplusplus
+extern "C" {
 #endif
 #define DRM_NAME "drm"
 #define DRM_MIN_ORDER 5
@@ -429,9 +430,11 @@
   __u64 user_data;
 };
 #ifdef __cplusplus
+}
 #endif
 #include "drm_mode.h"
 #ifdef __cplusplus
+extern "C" {
 #endif
 #define DRM_IOCTL_BASE 'd'
 #define DRM_IO(nr) _IO(DRM_IOCTL_BASE, nr)
@@ -603,5 +606,6 @@
 typedef struct drm_scatter_gather drm_scatter_gather_t;
 typedef struct drm_set_version drm_set_version_t;
 #ifdef __cplusplus
+}
 #endif
 #endif