New review comment by classabbyamp on void-packages repository

https://github.com/void-linux/void-packages/pull/38202#discussion_r929363094

Comment:
doesn't seem to be reported anywhere. The `.pc.in` file doesn't have a requires line either.

```
$ xbps-query -R --cat /usr/lib/pkgconfig/libairspy.pc libairspy-devel
prefix=/usr
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include

Name: AirSpy Library
Description: C Utility Library
Version: 1.0
Cflags: -I${includedir}/libairspy/ -I/usr/include/libusb-1.0
Libs: -L${libdir} -lairspy
Libs.private: 
```
the other library from airspy has the same thing pretty much