Vendor wgpu-hal 29.0.4 and i-slint-renderer-skia 1.17.1, unmodified

The Android develop view reads its frame back through memory (TD-1)
because wgpu's Vulkan swapchain never pre-rotates, and a portrait window
on this tablet's landscape panel then tears. The fix is a small patch to
each of these two crates, and this commit is only the ground it lands on:
both are byte-for-byte the crates.io sources the lockfile already
resolved, so the commits that follow are the patch and nothing else.

third_party/ is excluded from the workspace, or every path dependency
under the root would become a member and `--workspace` would test and
lint upstream code as ours. The README says how to carry the patches
across a Slint or wgpu bump, which matters because a stale version here
does not fail the build — cargo just warns and uses the unpatched crate.

third_party/wgpu-hal-29.0.4/examples/raw-gles.em.html

@@ -0,0 +1,16 @@
+<html>
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+  </head>
+  <body>
+    <canvas id="canvas" width="640" height="400"></canvas>
+    <script>
+        var Module = {
+            canvas: document.getElementById("canvas"),
+            preRun: [function() {ENV.RUST_LOG = "debug"}]
+        };
+    </script>
+    <script src="raw-gles.js"></script>
+  </body>
+</html>