[clang] [include-cleaner] Support multi-header symbols in mapping generator (PR #147720)

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=?utf-8?q?Ildikó?= Cseri <cseriildiko at icloud.com>,
=?utf-8?q?Ildikó?= Cseri <cseriildiko at icloud.com>,
=?utf-8?q?Ildikó?= Cseri <cseriildiko at icloud.com>,
=?utf-8?q?Ildikó?= Cseri <cseriildiko at icloud.com>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/147720 at github.com>


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@@ -7,268 +7,6 @@
 
 // Symbols that can be provided by any of the headers, ordered by the header
 // preference.
-// cppreference mentions the <locale> header is an alternative for these symbols,
-// but they are not per the standard.
-SYMBOL(consume_header, std::, <codecvt>)
-SYMBOL(generate_header, std::, <codecvt>)
-SYMBOL(little_endian, std::, <codecvt>)
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itislu wrote:

`locale` has been added as a mapping for these. But I can confirm from manual testing that these enums are indeed not declared in `locale`, despite cppreference clearly stating otherwise.


https://github.com/llvm/llvm-project/pull/147720