OvmfPkg/QemuBootOrderLib: Fix NOOPT build failure
OvmfPkg/QemuBootOrderLib: Fix NOOPT build failure

This patch is to fix the IA32/NOOPT/VS Toolchain build failure.
The VS2015 failure log as below:
QemuBootOrderLib.lib(ExtraRootBusMap.obj) :
error LNK2001: unresolved external symbol __allmul
s:\..\Build\OvmfIa32\NOOPT_VS2015\IA32\MdeModulePkg\
Universal\BdsDxe\BdsDxe\DEBUG\BdsDxe.dll :
fatal error LNK1120: 1 unresolved externals
NMAKE : fatal error U1077:
'"C:\Program Files\Microsoft Visual Studio 14.0\Vc\bin\link.exe"' :
return code '0x460'
Stop.

Cc: Jordan Justen <a79006884ba9cf5f4f7fcbb92a15b208780d8c97@intel.com>
Cc: Laszlo Ersek <7437296077edea1cb64451c122c4dac071f0cfbc@redhat.com>
Cc: Liming Gao <6480311aeeb4b006862f6d13ebabddc03f51e507@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Dandan Bi <1e8692d8ed8470b17e8ddd7612a0f029768dcb56@intel.com>
Reviewed-by: Laszlo Ersek <7437296077edea1cb64451c122c4dac071f0cfbc@redhat.com>

MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2