remove noise in test output

Author: liufengyun

compiler/test/debug/test

@@ -1,18 +1,21 @@
 #!/usr/bin/env bash
 
-set -x
-
 DIR="$( cd "$( dirname "$0" )" && pwd )"
 
+echo "start debug test..."
 for file in tests/debug/*.scala; do
    ./bin/dotc $file || exit 1
-   ./bin/dotr -d Test&
+   ./bin/dotr -d Test > /dev/null &
    $DIR/Gen $file > robot
-   expect robot
+   expect robot 2>&1 > /dev/null
 
    if [[ $? != 0 ]]; then
       echo "debug test failed for file $file"
       exit 1
    fi
+
+   echo "$file -- success"
 done
 
+echo "debug test success!"
+