libbz2 does not provide pkg-config

This package should be patched to provide the needed pc files for pkg-config.

$ apt-cache show libbz2-dev
Package: libbz2-dev
Architecture: amd64
Version: 1.0.8-2
Multi-Arch: same
Priority: optional
Section: libdevel
Source: bzip2
Origin: Ubuntu
...

$ pkg-config --libs bzip2
Package bzip2 was not found in the pkg-config search path.
Perhaps you should add the directory containing `bzip2.pc'
to the PKG_CONFIG_PATH environment variable
No package 'bzip2' found

See: https://gist.github.com/steakknife/4faee8a657db9402cbeb579279156e84
     https://github.com/libimobiledevice/sbmanager/issues/1
     https://askubuntu.com/questions/854776/bzip2-package-install-and-configure-with-sbmanager
     https://sourceforge.net/p/enlightenment/mailman/message/37332028/