Adjust server setup function

Author: GlassOfWhiskey

tests/unit/syscall/src/main.cpp

@@ -1,5 +1,7 @@
 #include <gtest/gtest.h>
 
+#include "capio/syscall.hpp"
+
 char **build_args() {
     char **args = (char **) malloc(3 * sizeof(uintptr_t));
 
@@ -59,7 +61,7 @@ class CapioServerEnvironment : public testing::Environment {
     void SetUp() override {
         if (server_pid < 0) {
             ASSERT_NE(std::getenv("CAPIO_DIR"), nullptr);
-            ASSERT_GE(server_pid = fork(), 0);
+            ASSERT_GE(server_pid = capio_syscall(SYS_fork), 0);
             if (server_pid == 0) {
                 execvpe(args[0], args, envp);
                 _exit(127);