fuzz: Link all targets once

src/test/fuzz/script_flags.cpp

@@ -13,12 +13,12 @@
 /** Flags that are not forbidden by an assert */
 static bool IsValidFlagCombination(unsigned flags);
 
-void initialize()
+void initialize_script_flags()
 {
     static const ECCVerifyHandle verify_handle;
 }
 
-void test_one_input(const std::vector<uint8_t>& buffer)
+FUZZ_TARGET_INIT(script_flags, initialize_script_flags)
 {
     CDataStream ds(buffer, SER_NETWORK, INIT_PROTO_VERSION);
     try {