[gtk-doc] pkg-config: add datadir as a pkg-config var

[Stefan Kost <stefkost src gnome org>]

commit 7cbb5311fcbfcb2541e840cea459d637bff0d9ec
Author: Stefan Kost <ensonic users sf net>
Date:   Fri Jan 7 16:39:32 2011 +0200

    pkg-config: add datadir as a pkg-config var
    
    Allow other modules to query the gtk-doc datadir location with
      pkg-config --variable=data_dir gtk-doc

 gtk-doc.pc.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk-doc.pc.in b/gtk-doc.pc.in
index 6c475f4..421f9f2 100644
--- a/gtk-doc.pc.in
+++ b/gtk-doc.pc.in
@@ -1,5 +1,6 @@
 prefix= prefix@
 exec_prefix= exec_prefix@
+data_dir= PACKAGE_DATA_DIR@
 
 Name: gtk-doc
 Description: API documentation generator