Use latest JDBC sources (Remove warnings when using GCC 8)

silvakid · silvakid · commit 5d99db8ddef1 · 2018-05-21T15:30:32.000+01:00
diff --git a/jdbc b/jdbc
@@ -1 +1 @@
-Subproject commit 61007def2537c493f558f5e34d169bc0e157ef40
+Subproject commit d3cbef4cc9384d7e012823443eb674ad38e0dbd6
