ansi-c/Array_Declarator* regression tests: front end is too permissive

[tautschnig]

These are marked KNOWNBUG at the moment, because goto-cc accepts what gcc wouldn't:

Array_Declarator2/main.c:5:18: error: variable length array must be bound in function definition
void fooStar(int x[*])
                 ^
1 error generated.
$ gcc Array_Declarator3/main.c
Array_Declarator3/main.c:7:11: error: type qualifier used in array declarator outside of function prototype
  int bar0[restrict] = {0};
          ^
1 error generated.
$ gcc Array_Declarator4/main.c
Array_Declarator4/main.c:7:11: error: 'static' used in array declarator outside of function prototype
  int bar1[static 1U] = {1};
          ^
1 error generated.
$ gcc Array_Declarator5/main.c
Array_Declarator5/main.c:7:11: error: type qualifier used in array declarator outside of function prototype
  int bar2[restrict 2U] = {1, 2};
          ^
1 error generated.
$ gcc Array_Declarator6/main.c
Array_Declarator6/main.c:7:11: error: 'static' used in array declarator outside of function prototype
  int bar3[restrict static 3U] = {1, 2, 3};
          ^
1 error generated.
$ gcc Array_Declarator7/main.c
Array_Declarator7/main.c:7:11: error: 'static' used in array declarator outside of function prototype
  int bar4[static restrict 4U] = {1, 2, 3, 4};
          ^
1 error generated.

It may be debatable whether the C front end really needs to produce errors here, it safely ignores these extra qualifiers anyway.

Best,
Michael