Implement full support for non-pointer pointers in custom allocators for vector.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@185093 91177308-0d34-0410-b5e6-96231b3b80d8

test/containers/sequences/vector.bool/shrink_to_fit.pass.cpp

@@ -15,6 +15,8 @@
 #include <vector>
 #include <cassert>
 
+#include "../../min_allocator.h"
+
 int main()
 {
     {
@@ -24,4 +26,13 @@ int main()
         assert(v.capacity() >= 101);
         assert(v.size() >= 101);
     }
+#if __cplusplus >= 201103L
+    {
+        std::vector<bool, min_allocator<bool>> v(100);
+        v.push_back(1);
+        v.shrink_to_fit();
+        assert(v.capacity() >= 101);
+        assert(v.size() >= 101);
+    }
+#endif
 }