RULE-8-7: Add appropriate definitions to test

Ensure definitions occur in one translation unit only.

Author: lcartey

c/misra/test/rules/RULE-8-7/ShouldNotBeDefinedWithExternalLinkage.expected

@@ -1,3 +1,3 @@
-| test.c:2:5:2:6 | i2 | Declaration with external linkage is accessed in only one translation unit $@. | test.c:8:3:8:4 | i2 | i2 |
-| test.h:2:12:2:13 | i1 | Declaration with external linkage is accessed in only one translation unit $@. | test.c:7:3:7:4 | i1 | i1 |
-| test.h:4:13:4:14 | f2 | Declaration with external linkage is accessed in only one translation unit $@. | test.c:10:3:10:4 | call to f2 | call to f2 |
+| test.c:3:5:3:6 | i1 | Declaration with external linkage is accessed in only one translation unit $@. | test.c:10:3:10:4 | i1 | i1 |
+| test.c:4:5:4:6 | i2 | Declaration with external linkage is accessed in only one translation unit $@. | test.c:11:3:11:4 | i2 | i2 |
+| test.c:6:6:6:7 | f2 | Declaration with external linkage is accessed in only one translation unit $@. | test.c:13:3:13:4 | call to f2 | call to f2 |

c/misra/test/rules/RULE-8-7/test.c

@@ -1,7 +1,10 @@
 #include "test.h"
-int i2;           // NON_COMPLIANT - accessed one translation unit
-static void f3(); // COMPLIANT - internal linkage
-extern void f3(); // COMPLIANT - internal linkage
+int i = 0;
+int i1 = 0;
+int i2;              // NON_COMPLIANT - accessed one translation unit
+void f1() {}         // Definition
+void f2() {}         // Definition
+static void f3() {}; // COMPLIANT - internal linkage
 void f() {
   i = 0;
   i1 = 0;