pkg-config reports incorrect path

[jbis9051]

After installing libks via Homebrew

brew install signalwire/signalwire/libks

as per https://github.com/signalwire/libstirshaken if I run pkg-config it reports the incorrect path

$ pkg-config --cflags libks
-I/opt/homebrew/Cellar/libks/1.8.2/include/libks

As you can see the path reported is one dir too deep. Instead, it should report /opt/homebrew/Cellar/libks/1.8.2/include.

This is consistent with other packages:

$ pkg-config --cflags libjwt
-I/opt/homebrew/Cellar/libjwt/1.15.2/include

This line needs to be changed

https://github.com/signalwire/libks/blob/master/libks.pc.in#L11

[andyshinn]

I had an error finding ks_platform.h while building FreeSWITCH which led me here. But after applying this fix the build then fails to find ks.h. I don't think the fix is as simple as this.