building little-scheemurr

the extension `little-scheemurr' will overwrite the following files:

  /home/user/.local/lib/chicken/11/little-scheemurr.read.o
  /home/user/.local/lib/chicken/11/little-scheemurr.read.link
  /home/user/.local/lib/chicken/11/little-scheemurr.read.so
  /home/user/.local/lib/chicken/11/little-scheemurr.read.import.so