Rule 8.2: Address clang specific error

This rule has a clang specific error, not permitting certain function
declarations. Update test case and expected results to reflect this.

Author: lcartey

c/misra/test/rules/RULE-8-2/FunctionTypesNotInPrototypeForm.expected.clang

@@ -0,0 +1,3 @@
+| test.c:3:6:3:7 | f1 | Function f1 declares parameter that is unnamed. |
+| test.c:4:6:4:7 | f2 | Function f2 does not specifiy void for no parameters present. |
+| test.c:7:5:7:6 | f5 | Function f5 declares parameter in unsupported declaration list. |

c/misra/test/rules/RULE-8-2/test.c.clang

@@ -0,0 +1,9 @@
+void f(int x); // COMPLIANT
+void f0(void); // COMPLIANT
+void f1(int);  // NON_COMPLIANT
+void f2();     // NON_COMPLIANT
+// void f3(x);       // NON_COMPILABLE
+void f4(const x); // NON_COMPLIANT[FALSE_NEGATIVE]
+int f5(x)         // NON_COMPLIANT
+    int x;
+{ return 1; }