[libgda] Enable setting up non-srcdir builds

[Emmanuele Bassi <ebassi src gnome org>]

commit 0f1740286a059a2ec94ef5b25bd636e916cd0195
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Sun Mar 26 11:47:23 2017 +0100

    Enable setting up non-srcdir builds
    
    It should be possible to run autogen.sh from the build directory, which
    is how Jhbuild does it.

 autogen.sh |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index 93f647e..f0be7fe 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -17,8 +17,12 @@ which gnome-autogen.sh || {
     exit 1git g
 }
 
+olddir=`pwd`
+cd "$srcdir"
+
 # Work around usage of gettext macros (AM_ICONV) without calling gettextize.
 # intltoolize is used intead. https://bugzilla.gnome.org/show_bug.cgi?id=660537
 touch config.rpath
 
-gnome-autogen.sh
+cd "$olddir"
+. gnome-autogen.sh "$@"