tools: adapt xenlight.pc and xlutil.pc to new pkg-config scheme

Instead of generating the *.pc.in files at configure time use the new
pkg-config scheme for those files. Add the dependencies to other Xen
libraries as needed.

Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>

.gitignore

@@ -193,7 +193,6 @@ tools/libxc/*.pc
 tools/libxl/_libxl.api-for-check
 tools/libxl/*.api-ok
 tools/libxl/*.pc
-tools/libxl/*.pc.in
 tools/libxl/dsdt*
 tools/libxl/libxlu_cfg_y.output
 tools/libxl/mk_dsdt