Add sys_rename

src/include/liblinux.h

@@ -26,6 +26,7 @@ ssize_t sys_write(int fd, const void *buf, size_t count);
 ssize_t sys_read(int fd, void *buf, size_t count);
 void *sys_mmap(void *addr, size_t len, int prot, int flags, int fildes, off_t off);
 int sys_munmap(void *addr, size_t len);
+int sys_rename(const char *old, const char *new);
 
 // TODO
 

src/liblinux.c

@@ -32,3 +32,7 @@ void *sys_mmap(void *addr, size_t len, int prot, int flags, int fildes, off_t of
 int sys_munmap(void *addr, size_t len) {
   return syscall(__NR_munmap, addr, len);
 }
+
+int sys_rename(const char *old, const char *new) {
+  return syscall(__NR_rename, old, new);
+}