suppress zend_string_equal_val uninitialised value(s) valgrind warning

Frederick888 · Frederick888 · commit 86925372a00f · 2019-09-29T01:48:03.000+10:00
see https://bugs.php.net/bug.php?id=76445
diff --git a/.valgrindrc b/.valgrindrc
@@ -0,0 +1 @@
+--suppressions=./tests/zend.supp
diff --git a/tests/zend.supp b/tests/zend.supp
@@ -0,0 +1,5 @@
+{
+   <uninitialised_values_zend_string_equal_val>
+   Memcheck:Cond
+   fun:zend_string_equal_val
+}
