message: Color libcore build output
diff: @@ -18,6 +18,6 @@ $RUSTC mini_core.rs --crate-name mini_core &&
  $RUSTC example.rs &&
  $RUSTC mini_core_hello_world.rs &&
  -$RUSTC ../target/libcore/src/libcore/lib.rs 2>&1 | (head -n 10; echo "===="; tail -n 1000)
  +$RUSTC ../target/libcore/src/libcore/lib.rs --color=always 2>&1 | (head -n 10; echo "===="; tail -n 1000)
  cat ../target/log.txt | sort | uniq -c | grep -v "rval unsize move" | grep -v "rval len"
  rm *.rlib ../target/log.txt
  