Eliminate use of fn in testcases

Fix cpp11_lambda_functions and rname to use fn1 instead of fn, since
fn is a reserved word as of PHP 7.4.

Examples/test-suite/cpp11_lambda_functions.i

@@ -56,7 +56,7 @@ auto lambda4 = [](int x, int y) { return x+y; };
 auto lambda5 = []() { return thing; };
 #endif
 
-void fn() {
+void fn1() {
   int stuff = 0;
   auto lambdaxxxx = [=,&stuff]() { return thing; };
 }

Examples/test-suite/java/rname_runme.java

@@ -25,7 +25,7 @@ public class rname_runme {
     bar.foo_u((long)10);
 
     RenamedBase base = new RenamedBase();
-    base.fn(base, base, base);
+    base.fn1(base, base, base);
     if (!base.newname(10.0).equals("Base"))
       throw new RuntimeException("base.newname");
 

Examples/test-suite/rname.i

@@ -22,7 +22,7 @@
 %rename (newname) Space::Base::oldname(double d) const;
 
 /* Rename derived class method only */
-%rename (Xfunc) Space::Derived::fn(Base baseValue, Base* basePtr, Base& baseRef);
+%rename (Xfunc) Space::Derived::fn1(Base baseValue, Base* basePtr, Base& baseRef);
 
 %inline %{
 class Bar {
@@ -43,14 +43,14 @@ class Base {
 public: 
   Base(){}; 
   virtual ~Base(){};
-  void fn(Base baseValue, Base* basePtr, Base& baseRef){}
+  void fn1(Base baseValue, Base* basePtr, Base& baseRef){}
   virtual const char * oldname(double d) const { return "Base"; }
 };
 class Derived : public Base {
 public:
   Derived(){}
   ~Derived(){}
-  void fn(Base baseValue, Base* basePtr, Base& baseRef){}
+  void fn1(Base baseValue, Base* basePtr, Base& baseRef){}
   virtual const char * oldname(double d) const { return "Derived"; }
 };
 }