use standard library path in .pc-files
use standard library path in .pc-files

There is no need to specify the standard library path in .pc-files. Remove
the path from the .pc-file.

Signed-off-by: Benedikt Spranger <3c247ed6d839709fbe8fae2e8ee4b974f27e6584@linutronix.de>

Linutronix/libuio,Linutronix/libuio