libstrophe: move pkg-config file to -devel pkg.
libstrophe: move pkg-config file to -devel pkg.

Closes #13973.

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

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