[libsoup] tests: fix under automake 1.13

[Dan Winship <danw src gnome org>]

commit 3fd71aca10bddab2da282737e4a26ee0c53e4dec
Author: Dan Winship <danw gnome org>
Date:   Tue Feb 19 10:34:22 2013 -0500

    tests: fix under automake 1.13
    
    The parallel test harness (which is the default as of automake 1.13)
    doesn't let you use make functions in the definition of TESTS. (It
    generates an invalid Makefile in this case.) Since the tests as
    currently written won't work with the parallel harness anyway (since
    each apache-based test stops apache when it's done), just force the
    serial harness for now.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=694135

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 1b12081..781361a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -11,7 +11,7 @@ AC_INIT([libsoup],[soup_major_version.soup_minor_version.soup_micro_version],[ht
 AC_CONFIG_SRCDIR([libsoup-2.4.pc.in])
 AC_CONFIG_MACRO_DIR([m4])
 
-AM_INIT_AUTOMAKE([1.11 foreign no-dist-gzip dist-xz -Wno-portability])
+AM_INIT_AUTOMAKE([1.11 foreign no-dist-gzip dist-xz -Wno-portability serial-tests])
 m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])],)
 
 AC_PROG_MAKE_SET