Add valgrind suppressions file

Author: cataphract

valgrind.supp

@@ -0,0 +1,24 @@
+{
+   re_SparseSetT_contains_cond
+   Memcheck:Cond
+   fun:_ZNK3re210SparseSetTIvE8containsEi
+   ...
+}
+{
+   re_SparseSetT_contains_value8
+   Memcheck:Value8
+   fun:_ZNK3re210SparseSetTIvE8containsEi
+   ...
+}
+{
+   re2_spartArray_has_index_cond
+   Memcheck:Cond
+   fun:_ZNK3re211SparseArrayIPNS_3NFA6ThreadEE9has_indexEi
+   ...
+}
+{
+   re2_spartArray_has_index_value8
+   Memcheck:Value8
+   fun:_ZNK3re211SparseArrayIPNS_3NFA6ThreadEE9has_indexEi
+   ...
+}