According to the pkg-config manual, "Libs" should not contain flags
for _required_ packages. Instead, they should be expressed via
"Requires". Let's do that
Change-Id: I2ab1fe8e4bbfc120b471d6c9f2312a89dbc7d42b
Osmocom applications typically use libosmocore select.[ch] event loop
code as their main event dispatch mechanism. When they want to deal
with libusb in a non-blocking/asynchronous way, they need to integrate
libusb into that select().
The new libosmousb is doing exactly that: Providing a shared utility
library for Osmocom programs that wish to use libusb. This is useful
for example in simtrace2 host utilitie as well as osmo-e1d.
Change-Id: I656a1a38cbb5b1f3a9145d2869d3b4d0adefcae3
Closes: OS#4299