If we want to base other paths off of exec_prefix or libdir (like the
python path), we can't because the xcb-proto.pc.in file omits those
variables. Add them so people can leverage them in their own builds.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Julien Danjou <julien@danjou.info>
prefix=@prefix@
+exec_prefix=@exec_prefix@
datarootdir=@datarootdir@
datadir=@datadir@
+libdir=@libdir@
xcbincludedir=@xcbincludedir@
pythondir=@pythondir@