doc: Fix typos in endif header comments

src/test/scriptnum10.h

@@ -179,4 +179,4 @@ private:
 };
 
 
-#endif // BITCOIN_TEST_BIGNUM_H
+#endif // BITCOIN_TEST_SCRIPTNUM10_H

src/test/util/setup_common.h

@@ -227,4 +227,4 @@ private:
     const std::string m_reason;
 };
 
-#endif
+#endif // BITCOIN_TEST_UTIL_SETUP_COMMON_H