C++: Fix ODR violations in dataflow tests

cpp/ql/test/library-tests/dataflow/dataflow-tests/flowOut.cpp

@@ -78,7 +78,7 @@ int* deref(int** p) { // $ ast-def=p ir-def=*p ir-def=**p
   return q;
 }
 
-void test1() {
+void flowout_test1() {
   int x = 0;
   int* p = &x;
   deref(&p)[0] = source();
@@ -95,7 +95,7 @@ void addtaint2(int** p) { // $ ast-def=p ir-def=*p ir-def=**p
   addtaint1(q);
 }
 
-void test2() {
+void flowout_test2() {
   int x = 0;
   int* p = &x;
   addtaint2(&p);

cpp/ql/test/library-tests/dataflow/dataflow-tests/self-Iterator.cpp

@@ -15,7 +15,7 @@ template<> struct std::iterator_traits<unsigned long>
 };
 
 
-int test() {
+int iterator_test() {
     unsigned long x = source();
     sink(x); // $ ast ir
 }

cpp/ql/test/library-tests/dataflow/dataflow-tests/true_upon_entry.cpp

@@ -5,7 +5,7 @@ int source();
 void sink(...);
 bool random();
 
-void test1() {
+void on_entry_test1() {
   int x = source();
   for (int i = 0; i < 10; i++) {
     x = 0;
@@ -13,7 +13,7 @@ void test1() {
   sink(x); // $ SPURIOUS: ir
 }
 
-void test2(int iterations) {
+void on_entry_test2(int iterations) {
   int x = source();
   for (int i = 0; i < iterations; i++) {
     x = 0;
@@ -21,7 +21,7 @@ void test2(int iterations) {
   sink(x); // $ ast,ir
 }
 
-void test3() {
+void on_entry_test3() {
   int x = 0;
   for (int i = 0; i < 10; i++) {
     x = source();
@@ -29,7 +29,7 @@ void test3() {
   sink(x); // $ ast,ir
 }
 
-void test4() {
+void on_entry_test4() {
   int x = source();
   for (int i = 0; i < 10; i++) {
     if (random())
@@ -39,7 +39,7 @@ void test4() {
   sink(x); // $ ast,ir
 }
 
-void test5() {
+void on_entry_test5() {
   int x = source();
   for (int i = 0; i < 10; i++) {
     if (random())
@@ -49,7 +49,7 @@ void test5() {
   sink(x); // $ ast,ir
 }
 
-void test6() {
+void on_entry_test6() {
   int y;
   int x = source();
   for (int i = 0; i < 10 && (y = 1); i++) {
@@ -57,7 +57,7 @@ void test6() {
   sink(x); // $ ast,ir
 }
 
-void test7() {
+void on_entry_test7() {
   int y;
   int x = source();
   for (int i = 0; i < 10 && (y = 1); i++) {
@@ -66,7 +66,7 @@ void test7() {
   sink(x); // $ SPURIOUS: ir
 }
 
-void test8() {
+void on_entry_test8() {
   int x = source();
   // It appears to the analysis that the condition can exit after `i < 10`
   // without having assigned to `x`. That is an effect of how the
@@ -78,7 +78,7 @@ void test8() {
   sink(x); // $ SPURIOUS: ast,ir
 }
 
-void test9() {
+void on_entry_test9() {
   int y;
   int x = source();
   for (int i = 0; (y = 1) && i < 10; i++) {
@@ -86,14 +86,14 @@ void test9() {
   sink(x); // $ ast,ir
 }
 
-void test10() {
+void on_entry_test10() {
   int x = source();
   for (int i = 0; (x = 1) && i < 10; i++) {
   }
   sink(x); // no flow
 }
 
-void test10(int b, int d) {
+void on_entry_test10(int b, int d) {
   int i = 0;
   int x = source();
   if (b)