Add read support for mips

buildtest.c

@@ -25,14 +25,12 @@ int main() {
   if(pid == 0) return 0;
   //TODO: wait on child to remove zombie process
 
-  #if defined(__x86_64__) || defined(__aarch64__)
   // Test the read syscall
   #define INPUT_BUFFER_LEN 4096
   char input_buffer[INPUT_BUFFER_LEN] = {0};
   write(STDIO, "Enter some text:", 16);
   intptr_t n_read = read(STDIO, input_buffer, INPUT_BUFFER_LEN);
   write(STDIO, input_buffer, n_read);
-  #endif
 
   return 69;
 }