binfmt-detector-cli: rewrite to support PE32+ binaries (#38)

Rewrite with hard-coded offsets into the PE file format to discern
if a binary is PE32 or PE32+, and then to determine if it contains
a "CLR Data Directory" entry that looks valid.

Tested with PE32 and PE32+ compiled Mono binaries, PE32 and PE32+ native
binaries, and a random assortment of garbage files.

Former-commit-id: 9e7ac86ec84f653a2f79b87183efd5b0ebda001b

mcs/class/corlib/Documentation/en/System.Globalization/Calendar.xml.REMOVED.git-id

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mcs/class/corlib/Documentation/en/System.Globalization/CompareInfo.xml.REMOVED.git-id

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mcs/class/corlib/Documentation/en/System.Globalization/CultureInfo.xml.REMOVED.git-id

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-6f9ded40f758316fed92fde4a93e30a177896b64

mcs/class/corlib/Documentation/en/System.Globalization/DateTimeFormatInfo.xml.REMOVED.git-id

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mcs/class/corlib/Documentation/en/System.Globalization/NumberFormatInfo.xml.REMOVED.git-id

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