[lldb][docs][NFC] Fix ClangModulesDeclVendor::AddModule parameter docs

(cherry picked from commit bda7289)

Author: Michael137

lldb/source/Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.h

@@ -42,11 +42,11 @@ class ClangModulesDeclVendor : public ClangDeclVendor {
   ///     The path to the exact module to be loaded.  E.g., if the desired
   ///     module is std.io, then this should be { "std", "io" }.
   ///
-  /// \param[in] exported_modules
+  /// \param[out] exported_modules
   ///     If non-NULL, a pointer to a vector to populate with the ID of every
   ///     module that is re-exported by the specified module.
   ///
-  /// \param[in] error_stream
+  /// \param[out] error_stream
   ///     A stream to populate with the output of the Clang parser when
   ///     it tries to load the module.
   ///
@@ -64,11 +64,11 @@ class ClangModulesDeclVendor : public ClangDeclVendor {
   /// \param[in] cu
   ///     The compilation unit to scan for imported modules.
   ///
-  /// \param[in] exported_modules
+  /// \param[out] exported_modules
   ///     A vector to populate with the ID of each module loaded (directly
   ///     and via re-exports) in this way.
   ///
-  /// \param[in] error_stream
+  /// \param[out] error_stream
   ///     A stream to populate with the output of the Clang parser when
   ///     it tries to load the modules.
   ///