buildroot

package: clean up indentation warnings in Config.in files

The check-package script when ran gives warnings on indentation issues
on all of these Config.in files. This patch cleans up warnings related to
the indentation of the Config.in files in the package directory

Signed-off-by: Adam Duskett <Adamduskett@outlook.com>
[Thomas: do not change package/kodi/Config.in and package/x11r7/Config.in.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>