[gexiv2] test: Run make check with libc malloc debug

[Jens Georg <jensgeorg src gnome org>]

commit 9cc7a56f690fdc43a82f8e29e01352755840cde6
Author: Jens Georg <mail jensge org>
Date:   Sun Mar 12 12:38:10 2017 +0100

    test: Run make check with libc malloc debug
    
    Signed-off-by: Jens Georg <mail jensge org>

 check.am |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/check.am b/check.am
index 0724bb0..5076b03 100644
--- a/check.am
+++ b/check.am
@@ -1,8 +1,10 @@
 TESTS_ENVIRONMENT = \
-       G_SLICE=debug-blocks \
+       G_SLICE=always-malloc \
        LD_LIBRARY_PATH=$(top_builddir)/.libs:$(LD_LIBRARY_PATH) \
        GI_TYPELIB_PATH=$(top_builddir) \
-       PYTHONPATH=$(top_srcdir)/test/python
+       PYTHONPATH=$(top_srcdir)/test/python \
+       MALLOC_CHECK_=2 \
+       MALLOC_PERTURB_=$$((RANDOM % 255))
 
 tests: check