Change pointer type in 7690 regression test and remove winbug designation.

Author: NlightNFotis

regression/cbmc/simplify_singleton_interval_7690/singleton_interval_in_assume_7690.c

@@ -23,7 +23,7 @@ void smap_init(smap_t *smap, size_t k) {
 
 void *smap_get(smap_t *smap, void *ptr) {
   size_t id = __CPROVER_POINTER_OBJECT(ptr);
-  void *sptr = smap->ptrs[id];
+  char *sptr = smap->ptrs[id];
   if (!sptr) {
     sptr = __CPROVER_allocate(smap->k * __CPROVER_OBJECT_SIZE(ptr), 1);
     smap->ptrs[id] = sptr;

regression/cbmc/simplify_singleton_interval_7690/test_smt2.desc

@@ -1,7 +1,7 @@
-CORE smt-backend winbug
+CORE smt-backend
 singleton_interval_in_assume_7690.c
 --pointer-check
-^\[stk_push\.pointer_dereference\.17] line \d+ dereference failure: pointer outside object bounds in stk-\>elems\[\(signed long int\)stk-\>top\]: SUCCESS$
+^\[stk_push\.pointer_dereference\.17] line \d+ dereference failure: pointer outside object bounds in stk-\>elems\[\(signed (long|long long) int\)stk-\>top\]: SUCCESS$
 ^VERIFICATION SUCCESSFUL$
 ^EXIT=0$
 ^SIGNAL=0$
@@ -12,6 +12,3 @@ https://github.com/diffblue/cbmc/pull/7761 this would fail in
 the (old) SMT backend in /src/solvers/smt2, because some constraints
 would not be propagated correctly, leaving the value of `stk_size`
 in `stk_new` as nondet.
-
-This fails on Windows VS2019 with `pointer arithmetic with unknown object size`,
-hence marked `winbug` to skip running on that system.