Implement support for parsing/interacting with NCAs. (#942)

* fs: implement support for interacting with ncas.

* spl: extend to use virtual keyslots

libraries/libstratosphere/include/stratosphere/fs/fs_memory_management.hpp

@@ -46,6 +46,17 @@ namespace ams::fs {
             return std::unique_ptr<T, Deleter>(static_cast<T *>(::ams::fs::impl::Allocate(sizeof(T))), Deleter(sizeof(T)));
         }
 
+        template<typename ArrayT>
+        std::unique_ptr<ArrayT, Deleter> MakeUnique(size_t size) {
+            using T = typename std::remove_extent<ArrayT>::type;
+
+            static_assert(std::is_pod<ArrayT>::value);
+            static_assert(std::is_array<ArrayT>::value);
+
+            const size_t alloc_size = sizeof(T) * size;
+            return std::unique_ptr<ArrayT, Deleter>(static_cast<T *>(::ams::fs::impl::Allocate(alloc_size)), Deleter(alloc_size));
+        }
+
     }
 
 }