update shared util

jebrando · jebrando · commit 938570e87626 · 2016-06-27T12:15:32.000-07:00
diff --git a/azure-c-shared-utility b/azure-c-shared-utility
@@ -1 +1 @@
-Subproject commit 9b70889cda18b0970e4b404007fe15fd494d510f
+Subproject commit 8d7a5e0538cf656a37b15b0783ef5e8868aa3792
