Update for stm32l4 dependency causes linker error about cortex-m-quickstart

[thalesfragoso]

The problem is that the PAC itself isn't really used in the example and the PAC is the responsible for providing the interrupt vectors to cortex-m-rt, the simplest solution is to have something like this:

use stm32l4 as _;

But yeah, the example is wrong and should be fixed.

[therealprof]

Hm, usually that should work automatically via the prelude. If it doesn't that's probably a problem with the HAL impl.

[thalesfragoso]

Hm, usually that should work automatically via the prelude. If it doesn't that's probably a problem with the HAL impl.

The problem is that the example in question doesn't use the prelude, or any use statements for the PAC.