Build with jdk-11

Index: src/native/linux/opengl/org_lwjgl_opengl_Pbuffer.c
--- src/native/linux/opengl/org_lwjgl_opengl_Pbuffer.c.orig
+++ src/native/linux/opengl/org_lwjgl_opengl_Pbuffer.c
@@ -42,6 +42,7 @@
 #include <stdlib.h>
 #include "org_lwjgl_opengl_LinuxPbufferPeerInfo.h"
 #include "org_lwjgl_opengl_Pbuffer.h"
+#include "org_lwjgl_opengl_LinuxDisplay.h"
 #include "extgl.h"
 #include "context.h"
 #include "common_tools.h"
