Set target brightness before starting frame buffer resume

To avoid flickering and other issues, the display backlight brightness
needs to be as close to wanted level as possible before the frame buffer
resume is initiated.

[mce] Set target brightness before starting frame buffer resume
Merge pull request #75 from spiiroin/fix_brightness_on_unblank

Set target brightness before starting frame buffer resume
Bump mce version to 1.15.2