Enable i386-linux-user

Signed-off-by: Zhai Edwin <edwin.zhai@intel.com>

Index: qemu-0.12.4/Makefile.target
===================================================================
--- qemu-0.12.4.orig/Makefile.target	2010-08-31 13:57:01.000000000 +0800
+++ qemu-0.12.4/Makefile.target	2010-08-31 14:03:06.000000000 +0800
@@ -46,8 +46,13 @@
 libobj-$(CONFIG_NOSOFTFLOAT) += fpu/softfloat-native.o
 libobj-y += op_helper.o helper.o
 libobj-$(CONFIG_NEED_MMU) += mmu.o
+ifndef CONFIG_LINUX_USER
 libobj-$(TARGET_I386) += helper_opengl.o opengl_exec.o
 libobj-$(TARGET_X86_64) += helper_opengl.o opengl_exec.o
+else
+libobj-$(TARGET_I386) += dummygl.o
+libobj-$(TARGET_X86_64) += dummygl.o
+endif #CONFIG_LINUX_USER
 libobj-$(TARGET_ARM) += dummygl.o
 libobj-$(TARGET_MIPS) += dummygl.o
 libobj-$(TARGET_PPC) += dummygl.o
Index: qemu-0.12.4/target-i386/dummygl.c
===================================================================
--- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ qemu-0.12.4/target-i386/dummygl.c	2010-08-31 15:25:25.000000000 +0800
@@ -0,0 +1,26 @@
+#include <string.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <stdint.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+void opengl_exec_set_parent_window(Display* _dpy, Window _parent_window)
+{
+
+}
+
+void opengl_process_enable(void)
+{
+
+}
+
+
+void mem_opengl(uint64_t ptr)
+{
+
+}
+
+void helper_opengl(void)
+{
+}