Re-exporting rtt_init not possible

[chanterheld]

Currently its not possible to re-export rtt_init due to the absolute import of critical_section in rtt_init.
It is possible of course, but requires the importer to also explicitly use rtt-target.
Is there any reason for it not being imported as crate::export::critical_section?

[Yatekii]

I don't think there is any specific reason for this. Macro imports often happen to have this issue go unnoticed :)