travis: use a valgrind suppressions file

We don't care about the supposed zlib errors, and the leak from
giterr_set isn't interesting, as it gets freed each time an error is
set.

Give valgrind a suppressions file so it doesn't tell us about them.

1 files changed, 12 insertions, 0 deletions

diff --git a/libgit2_clar.supp b/libgit2_clar.supp
new file mode 100644
index 000000000..f49eb0054
--- /dev/null
+++ b/libgit2_clar.supp
@@ -0,0 +1,12 @@
+{
+        ignore-zlib-errors-cond
+        Memcheck:Cond
+        obj:*libz.so*
+}
+
+{
+        ignore-giterr-set-leak
+        Memcheck:Leak
+        ...
+        fun:giterr_set
+}