[lld] [LTO][ELF][lld] Use unique string saver in ELF bitcode symbol parsing (PR #106670)

[Kazu Hirata via llvm-commits]

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@@ -9,6 +9,8 @@
 #ifndef LLD_ELF_INPUT_FILES_H
 #define LLD_ELF_INPUT_FILES_H
 
+#include <string>
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kazutakahirata wrote:

Once you remove `StringRef saved_symbol(const std::string &S);` below, you should be able to remove this include also.


https://github.com/llvm/llvm-project/pull/106670