Updated bundled protozero to v1.7.0

third_party/protozero/test/t/fixed64/testcase.cpp

@@ -1,8 +1,9 @@
 
 #include <testcase.hpp>
+
 #include "testcase.pb.h"
 
-int main(int c, char *argv[]) {
+int main() {
     TestFixed64::Test msg;
 
     msg.set_i(0);

third_party/protozero/test/t/fixed64/testcase.proto

@@ -1,3 +1,4 @@
+syntax = "proto2";
 
 option optimize_for = LITE_RUNTIME;