Merge "Default to pattern initialization for uninitialized variables."

am: b9b979c8aa

Change-Id: I9f17d6ec8f8952d0bec9d87216b2b3d21f599947

cc/config/global.go

@@ -165,6 +165,9 @@ func init() {
 			flags = append(flags, "-ftrivial-auto-var-init=zero -enable-trivial-auto-var-init-zero-knowing-it-will-be-removed-from-clang")
 		} else if ctx.Config().IsEnvTrue("AUTO_PATTERN_INITIALIZE") {
 			flags = append(flags, "-ftrivial-auto-var-init=pattern")
+		} else {
+			// Default to pattern initialization.
+			flags = append(flags, "-ftrivial-auto-var-init=pattern")
 		}
 
 		return strings.Join(flags, " ")