[dconf] autogen.sh: support calling from out of tree

[Ryan Lortie <ryanl src gnome org>]

commit eec74b9603f02ae63bd6b43c016972eb218a53bf
Author: Ryan Lortie <desrt desrt ca>
Date:   Thu Mar 8 11:29:05 2012 -0500

    autogen.sh: support calling from out of tree

 autogen.sh |   10 +++++++++-
 1 files changed, 9 insertions(+), 1 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index d1fc5c2..89f7ad7 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -2,6 +2,12 @@
 
 set -e
 
+test -n "$srcdir" || srcdir=`dirname "$0"`
+test -n "$srcdir" || srcdir=.
+
+olddir=`pwd`
+cd "$srcdir"
+
 if [ "$1" = "clean" ]; then
   rm -f aclocal.m4 configure config.* `find . -name Makefile.in` libtool
   rm -rf autom4te.cache m4 aux
@@ -25,7 +31,9 @@ CFLAGS=${CFLAGS=-ggdb}
 LDFLAGS=${LDFLAGS=-Wl,-O1}
 export CFLAGS LDFLAGS
 
+cd "$olddir"
+
 if test -z "$NOCONFIGURE"; then
-  ./configure "$@"
+  "$srcdir"/configure "$@"
 fi