[tracker] tests: Ensure folder is deleted

[Carlos Garnacho <carlosg src gnome org>]

commit 104f8df81ef46d570318e2f76ff8419a28ce976f
Author: Carlos Garnacho <carlosg gnome org>
Date:   Wed Sep 14 22:12:00 2016 +0200

    tests: Ensure folder is deleted
    
    If it previously fails somewhere here, the ttl folder will be
    created from earlier attempts, and mkdir will fail. Attempt to
    delete the folder before, just in case it exists.

 tests/functional-tests/ttl/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/tests/functional-tests/ttl/Makefile.am b/tests/functional-tests/ttl/Makefile.am
index bf02a1c..0c4d60e 100644
--- a/tests/functional-tests/ttl/Makefile.am
+++ b/tests/functional-tests/ttl/Makefile.am
@@ -2,7 +2,7 @@ BUILT_SOURCES = gen-test-data.stamp
 
 gen-test-data.stamp:
        @echo "Generate data"
-       mkdir ttl
+       rm -rf ttl && mkdir ttl
        ${top_srcdir}/utils/data-generators/cc/generate ${top_srcdir}/utils/data-generators/cc/max.cfg
        mv ttl/* . && rmdir ttl
        touch gen-test-data.stamp