Added source file for syscalls

include/syscalls.h

@@ -0,0 +1,9 @@
+#pragma once
+
+#include "kernel.h"
+
+size_t test_syscall(struct kernel_t *kernel, size_t arg1, size_t arg2, size_t arg3);
+
+size_t mmap(struct kernel_t *kernel, size_t location, size_t length, size_t flags);
+
+size_t munmap(struct kernel_t *kernel, size_t location, size_t length, size_t arg3);