* Generate and install a pkg-config file.
* Use Makefile libdir and includedir for pkg-config.
This splits the prefix out from these variables, so that
the same variables can be used to construct the pkg-config
file.
* Update the manifest for installation of pkg-config file.
* Revert "Use Makefile libdir and includedir for pkg-config."
This reverts commit a4cd6dc64a357dd5b91781045b3ac1c4679af97f.
* Use Makefile libdir and includedir for pkg-config.
This splits the prefix out from these variables, so that
the same variables can be used to construct the pkg-config
file.
