src: add AliasedStruct utility

For http2 (and eventually QUIC) we have a struct that is backed
by a v8::BackingStore and exposed to the JavaScript side as an
ArrayBuffer and TypedArray. This is similar to AliasedBuffer
except that it is fronted by a struct on the C++ side.

```c++
struct foo {
  uint32_t ex1;
  uint32_t ex2;
};

AliasedStruct<foo> foo_;

foo_->ex1 = 1;
foo_->ex2 = 2;

foo_.GetArrayBuffer();
```

Signed-off-by: James M Snell <jasnell@gmail.com>

PR-URL: https://github.com/nodejs/node/pull/32778
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/node.gyp b/node.gyp
index d82c4d89ffe..c3ffd2ff214 100644
--- a/node.gyp
+++ b/node.gyp
@@ -631,6 +631,8 @@
         'src/uv.cc',
         # headers to make for a more pleasant IDE experience
         'src/aliased_buffer.h',
+        'src/aliased_struct.h',
+        'src/aliased_struct-inl.h',
         'src/async_wrap.h',
         'src/async_wrap-inl.h',
         'src/base_object.h',