[gom] build: Replace hardcoded values in pkg-config file

[Bastien Nocera <hadess src gnome org>]

commit 07c35149964c7258e52effa374d877a8f2f102e8
Author: Alexander Tsoy <alexander tsoy me>
Date:   Fri Jul 29 03:18:03 2016 +0300

    build: Replace hardcoded values in pkg-config file
    
    https://bugzilla.gnome.org/show_bug.cgi?id=769291

 data/gom-1.0.pc.in |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/data/gom-1.0.pc.in b/data/gom-1.0.pc.in
index ce19de6..6edc841 100644
--- a/data/gom-1.0.pc.in
+++ b/data/gom-1.0.pc.in
@@ -1,11 +1,11 @@
 prefix=@prefix@
-exec_prefix=${prefix}
-libdir=${exec_prefix}/lib
-includedir=${exec_prefix}/include
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
 
 Name: Gom
 Description: GObject Data Mapper
 Version: @VERSION@
-Libs: -L${libdir} -lgom-1.0
-Cflags: -I${includedir}/gom-1.0
+Libs: -L${libdir} -lgom-@GOM_API_VERSION@
+Cflags: -I${includedir}/gom-@GOM_API_VERSION@
 Requires: gobject-2.0