[vala] vapigen: Install vapigen*.pc in multiarch compatible location

[Rico Tzschichholz <ricotz src gnome org>]

commit 0bb64c2e12f9b3a0235d3f767541d3efc4eada0e
Author: Andreas Henriksson <andreas henriksson endian se>
Date:   Wed Sep 23 11:04:16 2015 +0200

    vapigen: Install vapigen*.pc in multiarch compatible location
    
    This makes the pkgconfigdir path consistent to what is already used in
    (toplevel) Makefile.am.

 vapigen/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/vapigen/Makefile.am b/vapigen/Makefile.am
index 647304f..5de67c6 100644
--- a/vapigen/Makefile.am
+++ b/vapigen/Makefile.am
@@ -86,7 +86,7 @@ aclocaldir = $(datadir)/aclocal
 aclocal_DATA = vapigen.m4
 endif
 
-pkgconfigdir = $(datadir)/pkgconfig
+pkgconfigdir = $(libdir)/pkgconfig
 pkgconfig_DATA = vapigen@PACKAGE_SUFFIX@.pc
 
 vapigen@PACKAGE_SUFFIX@.pc: vapigen.pc