Rename object to fix duplicate symbol error

eth/rpc/constants_unix.go

@@ -21,7 +21,7 @@ package rpc
 /*
 #include <sys/un.h>
 
-int max_socket_path_size() {
+int maximum_socket_path_size() {
 struct sockaddr_un s;
 return sizeof(s.sun_path);
 }
@@ -29,5 +29,5 @@ return sizeof(s.sun_path);
 import "C"
 
 var (
-	max_path_size = C.max_socket_path_size()
+	max_path_size = C.maximum_socket_path_size()
 )