Add native image installation in the install script?

[Zethson]

Hi,

note: I am using Arch Linux and could not use your installation script, since Arch already has its own SDK handler and will ignore anything your script does related to installing GraalVM and setting JAVA_HOME etc:

After installating graalVM and setting JAVA_HOME I ran into: oracle/graal#2151

Basically I had to gu install native-image or I got weird errors.
Source: https://www.graalvm.org/docs/reference-manual/native-image/#install-native-image

Maybe the newest versions do not ship native-image anymore?

[remkop]

I haven't been keeping this project up to date.
Thanks for pointing this out!