Java: Make some query libraries local.

java/ql/lib/semmle/code/java/security/BrokenCryptoAlgorithmQuery.qll

@@ -12,6 +12,7 @@ private class ShortStringLiteral extends StringLiteral {
 /**
  * A string literal that may refer to a broken or risky cryptographic algorithm.
  */
+overlay[local?]
 class BrokenAlgoLiteral extends ShortStringLiteral {
   BrokenAlgoLiteral() {
     this.getValue().regexpMatch(getInsecureAlgorithmRegex()) and

java/ql/lib/semmle/code/java/security/StaticInitializationVectorQuery.qll

@@ -33,6 +33,7 @@ private class StaticByteArrayCreation extends ArrayCreationExpr {
 }
 
 /** An expression that updates `array`. */
+overlay[local?]
 private class ArrayUpdate extends Expr {
   Expr array;
 

java/ql/lib/semmle/code/java/security/UrlForwardQuery.qll

@@ -69,6 +69,7 @@ private class FollowsBarrierPrefix extends UrlForwardBarrier {
   FollowsBarrierPrefix() { this.asExpr() = any(BarrierPrefix fp).getAnAppendedExpression() }
 }
 
+overlay[local?]
 private class BarrierPrefix extends InterestingPrefix {
   int offset;