[clang] [clang] fix `--unwindlib` option doc (PR #143497)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-clang

Author: beef (fee1-dead)

<details>
<summary>Changes</summary>

the values it takes should be `libunwind` and not `unwindlib`.

---
Full diff: https://github.com/llvm/llvm-project/pull/143497.diff


1 Files Affected:

- (modified) clang/include/clang/Driver/Options.td (+1-1) 


``````````diff
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 89c63fb3397d3..a4f4770a1aa2a 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -6001,7 +6001,7 @@ def stdlibxx_isystem : JoinedOrSeparate<["-"], "stdlib++-isystem">,
   Flags<[NoXarchOption]>, MetaVarName<"<directory>">;
 def unwindlib_EQ : Joined<["-", "--"], "unwindlib=">,
   Visibility<[ClangOption, CC1Option]>,
-  HelpText<"Unwind library to use">, Values<"libgcc,unwindlib,platform">;
+  HelpText<"Unwind library to use">, Values<"libgcc,libunwind,platform">;
 def sub__library : JoinedOrSeparate<["-"], "sub_library">;
 def sub__umbrella : JoinedOrSeparate<["-"], "sub_umbrella">;
 def system_header_prefix : Joined<["--"], "system-header-prefix=">,

``````````

</details>


https://github.com/llvm/llvm-project/pull/143497