Rollup merge of rust-lang#120974 - zmodem:exportas, r=durin42

llvm-wrapper: adapt for LLVM API change: Add support for EXPORTAS name types

Adapt for llvm/llvm-project@8f23464.

Author: matthiaskrgr

compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp

@@ -1801,6 +1801,9 @@ extern "C" LLVMRustResult LLVMRustWriteImportLibrary(
       std::string{},    // ExtName
       std::string{},    // SymbolName
       std::string{},    // AliasTarget
+#if LLVM_VERSION_GE(19, 0)
+      std::string{},    // ExportAs
+#endif
       ordinal,          // Ordinal
       ordinal_present,  // Noname
       false,            // Data