[arch-general] archlinux-java script in java-common package

The archlinux-java script in the java-common package has a lot of code that is inappropriate as a Bash script. (ShellCheck prints a lot of errors.) I have created a patch that fixes these errors with minimal changes. I put the patch on GitHub Gists because it collapses for some reason when I send the patch by email. all.patch is a patch that contains all the changes, and the other files split the changes by function. This is my first time sending a patch to a mailing list, so there may be something wrong with the way it is sent. Patch https://gist.github.com/Hayao0819/bacccc3eebeab73159001f60c9d35a43