[libgtkmusic] Fixed outdated pkgconfig file.

[Leandro Resende Mattioli <lmattioli src gnome org>]

commit 9453b3be88c32fc1685863bc28699ea68fa0d921
Author: Leandro Resende Mattioli <leandro mattioli gmail com>
Date:   Thu Apr 5 00:55:53 2018 -0300

    Fixed outdated pkgconfig file.

 gtkmusic.pc.in |   14 +++++++-------
 1 files changed, 7 insertions(+), 7 deletions(-)
---
diff --git a/gtkmusic.pc.in b/gtkmusic.pc.in
index b7b7c5a..778ad97 100644
--- a/gtkmusic.pc.in
+++ b/gtkmusic.pc.in
@@ -1,13 +1,13 @@
-prefix=@CMAKE_INSTALL_PREFIX@
-exec_prefix=@CMAKE_INSTALL_PREFIX@/bin
-libdir=@CMAKE_INSTALL_PREFIX@/lib
-includedir=@CMAKE_INSTALL_PREFIX@/include
-datarootdir=@CMAKE_INSTALL_PREFIX@/share
+prefix=@install_prefix@
+exec_prefix=@install_prefix@/bin
+libdir=@install_prefix@/lib
+includedir=@install_prefix@/include
+datarootdir=@install_prefix@/share
 datadir=${datarootdir}
 
 Name: libgtkmusic
 Description: Gtk musical widgets collection
-Version: @VERSION_STRING@
+Version: @version@
 Requires: glib-2.0 gobject-2.0 gtk+-3.0 gee-0.8
 Libs: -L${libdir} -lgtkmusic
-Cflags: -I${includedir}/gtkmusic-@VERSION_STRING@
+Cflags: -I${includedir}/gtkmusic-@version@