[NFC][clang-scan-deps] Refine the implementation of dependency_directives_scan::Token::isOneOf (#150433)

Use fold expression to refine the implementation of
`dependency_directives_scan::Token::isOneOf`.

Signed-off-by: yronglin <[email protected]>

Author: yronglin

clang/include/clang/Lex/DependencyDirectivesScanner.h

@@ -47,11 +47,10 @@ struct Token {
 
   bool is(tok::TokenKind K) const { return Kind == K; }
   bool isNot(tok::TokenKind K) const { return Kind != K; }
-  bool isOneOf(tok::TokenKind K1, tok::TokenKind K2) const {
-    return is(K1) || is(K2);
-  }
-  template <typename... Ts> bool isOneOf(tok::TokenKind K1, Ts... Ks) const {
-    return is(K1) || isOneOf(Ks...);
+  template <typename... Ts> bool isOneOf(Ts... Ks) const {
+    static_assert(sizeof...(Ts) > 0,
+                  "requires at least one tok::TokenKind specified");
+    return (is(Ks) || ...);
   }
 };