RULE-8-7: Restructure test

Move single translation unit items into the translation unit, not
the shared header.

Author: lcartey

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

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

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

@@ -1,4 +1,7 @@
 #include "test.h"
+int i2;           // NON_COMPLIANT - accessed one translation unit
+static void f3(); // COMPLIANT - internal linkage
+extern void f3(); // COMPLIANT - internal linkage
 void f() {
   i = 0;
   i1 = 0;

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

@@ -1,7 +1,4 @@
 extern int i;     // COMPLIANT - accessed multiple translation units
 extern int i1;    // NON_COMPLIANT - accessed one translation unit
-int i2;           // NON_COMPLIANT - accessed one translation unit
 extern void f1(); // COMPLIANT  - accessed multiple translation units
-extern void f2(); // NON_COMPLIANT - accessed one translation unit
-static void f3(); // COMPLIANT - internal linkage
-extern void f3(); // COMPLIANT - internal linkage
+extern void f2(); // NON_COMPLIANT - accessed one translation unit