Add -Werror=date-time to target builds

Soong port of https://android-review.googlesource.com/195464

Change-Id: I68acfb53be962ffd5c488337517dadb950a13b6f
diff --git a/cc/cc.go b/cc/cc.go
index 9e75dd8..65ccf3d 100644
--- a/cc/cc.go
+++ b/cc/cc.go
@@ -94,6 +94,7 @@
 		"-Werror=non-virtual-dtor",
 		"-Werror=address",
 		"-Werror=sequence-point",
+		"-Werror=date-time",
 	}
 
 	hostGlobalCflags = []string{}