Changes to existing files to add HAX support

HAX (Hardware-based Accelerated eXecution) employes hardware virtualization
technology to boost performance of the Android emulator on Mac OS X or Windows
hosts.
This changeset includes the changes required to the existing files. To pass
the compilation, hax.h is added, but CONFIG_HAX is disabled so that no
real changes added.

Change-Id: Ifa5777e8788e6698747c1ec4cd91315161c2ca0b
Signed-off-by: Zhang, Xiantao <xiantao.zhang@intel.com>
Signed-off-by: Xin, Xiaohui <xiaohui.xin@intel.com>
Signed-off-by: Jiang Yunhong <yunhong.jiang@intel.com>
Signed-off-by: Nakajima, Jun <jun.nakajima@intel.com>
diff --git a/qemu-options.hx b/qemu-options.hx
index 880025e..b2ecf1b 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -1359,6 +1359,17 @@
 if KVM support is enabled when compiling.
 ETEXI
 
+DEF("disable-hax", 0, QEMU_OPTION_disable_hax, \
+    "-disable-hax   Disable HAX full virtualization support\n")
+STEXI
+@item -disable-hax
+Disable HAX (Hardware-based Acceleration eXecution) support. When HAX
+support is detected, the emulator will enable it by default. This
+option will disable the default action. HAX is supported only on Mac OS X
+and Windows platforms (if VT is present), and it does not conflict
+with KVM.
+ETEXI
+
 #ifdef CONFIG_XEN
 DEF("xen-domid", HAS_ARG, QEMU_OPTION_xen_domid,
     "-xen-domid id   specify xen guest domain id\n")