e9compile: remove xargs

xargs is an unnecessary dependency of e9compile

xargs is only used to print the compile command

https://github.com/GJDuck/e9patch/blob/5e65b67a85f9bc49cb004e2c4229d79f88cc0a59/e9compile.sh#L71

fix:

```
echo "$COMPILE"
# or 
echo $COMPILE
```
