Update impeller-cmake-example (#50808)

Lots of fixes in this update. Let's see how it fares against the Fuchsia SDK compiler. https://github.com/bdero/impeller-cmake-example/pull/22
diff --git a/DEPS b/DEPS
index f0efe4d..6e66ced 100644
--- a/DEPS
+++ b/DEPS
@@ -1019,7 +1019,7 @@
    },
 
   'src/third_party/impeller-cmake-example': {
-     'url': Var('flutter_git') + '/third_party/impeller-cmake-example.git' + '@' + 'd1a26a51dc6890e5f851749e3d8e048703f24f51',
+     'url': Var('flutter_git') + '/third_party/impeller-cmake-example.git' + '@' + 'c44e8093972c969acf171be72591e408a85fdc53',
      'condition': 'download_impeller_cmake_example',
   },