SFML: fix -devel package
SFML: fix -devel package

* move cmake files to -devel
* remove duplicate pkg-config files in /usr

Closes #14270.

Signed-off-by: Enno Boland <00f63b104cc192f7f01eceab27b343d9965c9f26@voidlinux.eu>

NeoChontrix/void-packages,necrophcodr/void-packages,NeoChontrix/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,NeoChontrix/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,NeoChontrix/void-packages