Update kernel headers with new parser.

Test: Builds.
Change-Id: I3f0714d53ac893ccc3e66f7a92d0ea7a6737f1c3
diff --git a/libc/kernel/uapi/drm/amdgpu_drm.h b/libc/kernel/uapi/drm/amdgpu_drm.h
index bdf59d6..2013fa7 100644
--- a/libc/kernel/uapi/drm/amdgpu_drm.h
+++ b/libc/kernel/uapi/drm/amdgpu_drm.h
@@ -20,6 +20,7 @@
 #define __AMDGPU_DRM_H__
 #include "drm.h"
 #ifdef __cplusplus
+extern "C" {
 #endif
 #define DRM_AMDGPU_GEM_CREATE 0x00
 #define DRM_AMDGPU_GEM_MMAP 0x01
@@ -593,5 +594,6 @@
 #define AMDGPU_FAMILY_AI 141
 #define AMDGPU_FAMILY_RV 142
 #ifdef __cplusplus
+}
 #endif
 #endif