Feature request: print information about microcode and splash on UEFI generation
*Created by: kleinph*
During UEFI executable generation, information about used _UEFI stub_, _kernel_, _cmdline_ and _os-release_ file are printed to the console. It would be nice to print also information about the used microcode image and splash file, so the user can be sure that the generated UEFI executable includes everything as specified.
Example output:
```
-> Using microcode image /boot/intel-ucode.img
-> Using splash image /usr/share/systemd/bootctl/splash-arch.bmp
```
OS: Arch Linux
mkinitcpio version: 31_rc0
issue