policycoreutils: restorecond: use pkg-config to find dbus-glib-1 files

On Ubuntu some header files are located in /usr/lib/x86_64-linux-gnu/,
not /usr/lib64/:

    $ pkg-config --cflags dbus-glib-1
    -I/usr/include/dbus-1.0 -I/usr/lib/x86_64-linux-gnu/dbus-1.0/include
    -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include

Use pkg-config instead of hard-coded paths to find glib and dbus-glib
headers and libraries.

This is needed in order to use environments provided for example by
https://travis-ci.org/.

Signed-off-by: Nicolas Iooss <nicolas.iooss@m4x.org>
1 file changed