Change function declaration to be prototyped. (#182)

With the introduction of type variable types in clang, it is important to make sure that generic functions are a FunctionProtoType. We did not allow generic functions to be FunctionNoProtoType. In order for the tests to work correctly, I had to add "void" in () if there are no parameters.

tests/parsing/typevariable/forany_parsing.c

@@ -10,7 +10,7 @@
 // expected-no-diagnostics
 
 // Testing for function declaration with function body, without parameters.
-_For_any(T) T TestDefinitionWithNoParameter() {
+_For_any(T) T TestDefinitionWithNoParameter(void) {
   // Testing the scope created by forany specifier contains function body scope
   T returnVal;
   return returnVal;
@@ -23,7 +23,7 @@ _For_any(T, S) T TestDefinitionWithParameter(T at, T bt, S cs) {
 }
 
 // Testing for function declaration without function body, without parameters.
-_For_any(R) R TestDeclarationWithNoParameter();
+_For_any(R) R TestDeclarationWithNoParameter(void);
 // Testing for function declaration without function body, with parameters
 _For_any(Q) Q TestDeclarationWithParameter(Q aq, Q bq, Q cq);
 

tests/parsing/typevariable/forany_parsing_error.c

@@ -8,9 +8,9 @@
 //
 // RUN: %clang_cc1 -fcheckedc-extension -verify %s
 
-_For_any(R) R foo();
+_For_any(R) R foo(void);
 // Testing scope created by for any specifier is exited successfully.
 R thisShouldProduceError; //expected-error{{unknown type name 'R'}}
-_For_any() void foo2(); // expected-error{{expected type variable identifier}}
-_For_any(R, ) R foo3(); // expected-error{{expected type variable identifier}}
-_For_any(R T) R foo4(); // expected-error{{expected , or )}}
+_For_any() void foo2(void); // expected-error{{expected type variable identifier}}
+_For_any(R, ) R foo3(void); // expected-error{{expected type variable identifier}}
+_For_any(R T) R foo4(void); // expected-error{{expected , or )}}