manage compile and link flags for libraries (transitional package)

 pkgconf is an implementation of the pkg-config system, which helps to configure
 compiler and linker flags for development frameworks.
 .
 pkgconf is a replacement for pkg-config, providing additional functionality
 while also maintaining compatibility.
 .
 This package only provides a dependency link to the pkgconf package to help
 with package upgrades. It can be safely removed.