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ICC sysinfo fixes

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#754 建立於 2019年1月16日

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描述

sysinfo fails to compile on OSX with ICC due to two issues:

error #2259 is caused by the return value from sysinfo.cc:558 being implicitly cast from unsigned long long to double.

error #177 is caused by methods at sysinfo.cc:112 ValueUnion::GetAsString and sysinfo:114 ValueUnion::GetAsInteger being unused.

To resolve this we should:

  1. add an explicit cast for hz to double
  2. add -wd177 to the ICC compiler flags

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