Add MinidumpSystemInfoWriter and its test

minidump/minidump_extensions.h

 // Copyright 2014 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
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   kMinidumpCPUArchitectureIA64 = PROCESSOR_ARCHITECTURE_IA64,
   kMinidumpCPUArchitectureAlpha64 = PROCESSOR_ARCHITECTURE_ALPHA64,
   kMinidumpCPUArchitectureMSIL = PROCESSOR_ARCHITECTURE_MSIL,
 
   //! \brief 64-bit x86.
   //!
   //! These systems identify their CPUs as “x86_64”, “amd64”, or “x64”.
   kMinidumpCPUArchitectureAMD64 = PROCESSOR_ARCHITECTURE_AMD64,
 
+  //! \brief A 32-bit x86 process running on IA-64 (Itanium).
+  //!
+  //! \note This value is not used in minidump files for 32-bit x86 processes
+  //!     running on a 64-bit-capable x86 CPU and operating system. In that
+  //!     configuration, #kMinidumpCPUArchitectureX86 is used instead.
   kMinidumpCPUArchitectureX86Win64 = PROCESSOR_ARCHITECTURE_IA32_ON_WIN64,
+
   kMinidumpCPUArchitectureNeutral = PROCESSOR_ARCHITECTURE_NEUTRAL,
   kMinidumpCPUArchitectureSPARC = 0x8001,
 
   //! \brief 64-bit PowerPC.
   //!
   //! These systems identify their CPUs generically as “ppc64”, or with more
   //! specific names such as “ppc970”.
   kMinidumpCPUArchitecturePPC64 = 0x8002,
 
   //! \brief 64-bit ARM.
@@ skipping 196 matching lines @@
   //! If MINIDUMP_LOCATION_DESCRIPTOR::DataSize is `0`, no key-value pairs are
   //! present, and MINIDUMP_LOCATION_DESCRIPTOR::Rva should not be consulted.
   //!
   //! This field is present when #version is at least `1`.
   MINIDUMP_LOCATION_DESCRIPTOR simple_annotations;
 };
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_MINIDUMP_MINIDUMP_EXTENSIONS_H_