$TESTDATA_DIR$/sourceMapDuplicatePath/
-Xlegacy-deprecated-no-warn
-Xuse-deprecated-legacy-compiler
-source-map
-source-map-base-dirs
$TESTDATA_DIR$/sourceMapDuplicatePath/foo:$TESTDATA_DIR$/sourceMapDuplicatePath/bar
-output
$TEMP_DIR$/out.js