[libsecret] Makefile.am: Compile vala unstable tests with SECRET_WITH_UNSTABLE=1.

[Stefan Walter <stefw src gnome org>]

commit f59f2b6a82261c79e87d7b9f6ecba8538b8cac3a
Author: Robert Ancell <robert ancell canonical com>
Date:   Mon May 30 12:18:40 2016 +1200

    Makefile.am: Compile vala unstable tests with SECRET_WITH_UNSTABLE=1.
    
    Without this the generated C code compiles without the correct header (warnings
    are disabled so this is not obvious). This was causing the test to crash on
    Ubuntu (exact cause not diagnosed).
    
    https://bugzilla.gnome.org/show_bug.cgi?id=767002

 libsecret/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libsecret/Makefile.am b/libsecret/Makefile.am
index 0601460..7d96774 100644
--- a/libsecret/Makefile.am
+++ b/libsecret/Makefile.am
@@ -282,7 +282,7 @@ SUFFIXES = .vala .vala.o
 test-vala-lang.vala.o: libsecret/test-vala-lang.vala $(VALA_TESTS_VAPIS)
        $(VALA_V) $(VALAC) --compile $(VALA_TESTS_FLAGS) $<
 test-vala-unstable.vala.o: libsecret/test-vala-unstable.vala $(VALA_TESTS_VAPIS)
-       $(VALA_V) $(VALAC) --compile $(VALA_TESTS_FLAGS) $<
+       $(VALA_V) $(VALAC) --compile --Xcc=-DSECRET_WITH_UNSTABLE=1 $(VALA_TESTS_FLAGS) $<
 
 test_vala_lang_SOURCES =
 test_vala_lang_LDADD = \