fix compilation errors

Gabriele Contini

2020-03-15 a1b64080d1525a7a65e53f33d1a3fd257957e732

 src/library/os/cpu_info_common.cpp

@@ -29,6 +29,7 @@
   }
   return is_virtual;
}

VIRTUALIZATION_DETAIL CpuInfo::getVirtualizationDetail() const {
   string cpu_vendor = vendor();
   auto it = virtual_cpu_names.find(cpu_vendor);