Add overlay annotations in 4 PrintAst query files

Author: owen-mc

go/ql/test/library-tests/semmle/go/PrintAst/PrintAstExcludeComments.ql

@@ -5,6 +5,7 @@
 import go
 import semmle.go.PrintAst
 
+overlay[local]
 class Cfg extends PrintAstConfiguration {
   override predicate shouldPrintFunction(FuncDecl func) { any() }
 

go/ql/test/library-tests/semmle/go/PrintAst/PrintAstNestedFunction.ql

@@ -5,6 +5,7 @@
 import go
 import semmle.go.PrintAst
 
+overlay[local]
 class Cfg extends PrintAstConfiguration {
   override predicate shouldPrintFunction(FuncDecl func) { func.getName() = "hasNested" }
 

go/ql/test/library-tests/semmle/go/PrintAst/PrintAstRestrictFile.ql

@@ -5,6 +5,7 @@
 import go
 import semmle.go.PrintAst
 
+overlay[local]
 class Cfg extends PrintAstConfiguration {
   override predicate shouldPrintFunction(FuncDecl func) { any() }
 

go/ql/test/library-tests/semmle/go/PrintAst/PrintAstRestrictFunction.ql

@@ -5,6 +5,7 @@
 import go
 import semmle.go.PrintAst
 
+overlay[local]
 class Cfg extends PrintAstConfiguration {
   override predicate shouldPrintFunction(FuncDecl func) { func.getName() = "g" }