[pyatspi2] Fix autogen.sh for non-sourcedir build

[Mike Gorse <mgorse src gnome org>]

commit a4c9ade0c875ca26a172af14f86241a745a1b992
Author: Theppitak Karoonboonyanan <thep linux thai net>
Date:   Wed Aug 22 18:25:57 2012 +0700

    Fix autogen.sh for non-sourcedir build
    
    * Detect $srcdir from command line
    * Invoke autotools stuffs in $srcdir
    * Invoke configure from $builddir

 autogen.sh |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/autogen.sh b/autogen.sh
index de36d60..9c7e0c0 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -3,8 +3,12 @@
 
 #name of package
 test "$PKG_NAME" || PKG_NAME=Package
+test "$srcdir" || srcdir=`dirname "$0"`
 test "$srcdir" || srcdir=.
 
+olddir=`pwd`
+cd "$srcdir"
+
 # default version requirements ...
 test "$REQUIRED_AUTOCONF_VERSION" || REQUIRED_AUTOCONF_VERSION=2.53
 test "$REQUIRED_AUTOMAKE_VERSION" || REQUIRED_AUTOMAKE_VERSION=1.9
@@ -525,6 +529,8 @@ if $want_maintainer_mode; then
     conf_flags="--enable-maintainer-mode"
 fi
 
+cd "$olddir"
+
 if test x$NOCONFIGURE = x; then
     printbold Running $srcdir/configure $conf_flags "$@" ...
     $srcdir/configure $conf_flags "$@" \