[mm-common] skeletonmm/skeleton/meson.build: Minor fix of generated .pc file

[Kjell Ahlstedt <kjellahl src gnome org>]

commit ee64f142f721369ce65c28cd456f860e685b5bb7
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Tue Apr 28 10:14:57 2020 +0200

    skeletonmm/skeleton/meson.build: Minor fix of generated .pc file
    
    libdir=${exec_prefix}/lib, as when it's generated with Autotools.

 skeletonmm/skeleton/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/skeletonmm/skeleton/meson.build b/skeletonmm/skeleton/meson.build
index 85fa533..49dca7a 100644
--- a/skeletonmm/skeleton/meson.build
+++ b/skeletonmm/skeleton/meson.build
@@ -9,7 +9,7 @@
 pkg_conf_data = configuration_data()
 pkg_conf_data.set('prefix', install_prefix)
 pkg_conf_data.set('exec_prefix', '${prefix}')
-pkg_conf_data.set('libdir', '${prefix}' / install_libdir)
+pkg_conf_data.set('libdir', '${exec_prefix}' / install_libdir)
 pkg_conf_data.set('datarootdir', '${prefix}' / install_datadir)
 pkg_conf_data.set('datadir', '${datarootdir}')
 pkg_conf_data.set('includedir', '${prefix}' / install_includedir)