Rollup merge of #121389 - klensy:llvm-warn-fix, r=nikic

llvm-wrapper: fix few warnings

Two fixes: first one is simple unsigned -> uint64_t, but how second one is more subtile, see commit description.

compiler/rustc_llvm/llvm-wrapper/ArchiveWrapper.cpp

@@ -67,7 +67,7 @@ typedef RustArchiveIterator *LLVMRustArchiveIteratorRef;
 
 extern "C" LLVMRustArchiveRef LLVMRustOpenArchive(char *Path) {
   ErrorOr<std::unique_ptr<MemoryBuffer>> BufOr =
-      MemoryBuffer::getFile(Path, -1, false);
+      MemoryBuffer::getFile(Path, /*IsText*/false, /*RequiresNullTerminator=*/false);
   if (!BufOr) {
     LLVMRustSetLastError(BufOr.getError().message().c_str());
     return nullptr;

compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp

@@ -1262,7 +1262,7 @@ enum class LLVMRustDiagnosticLevel {
 extern "C" void
 LLVMRustUnpackInlineAsmDiagnostic(LLVMDiagnosticInfoRef DI,
                                   LLVMRustDiagnosticLevel *LevelOut,
-                                  unsigned *CookieOut,
+                                  uint64_t *CookieOut,
                                   LLVMTwineRef *MessageOut) {
   // Undefined to call this not on an inline assembly diagnostic!
   llvm::DiagnosticInfoInlineAsm *IA =