Update Darwin CMake prebuilt to 3.22.1
Fusion2: http://fusion2/610fb8e3-5633-41a6-b50b-ed5819f55cd6
GCS path: gs://ndk-kokoro-release-artifacts/prod/ndk/cmake/darwin_release/3/20211215-131219
Prebuilt updated using: ndk/scripts/update_kokoro_prebuilts.py
Test: Treehugger, Kokoro presubmit
Bug: http://b/213946898
Change-Id: Icbb6d90cad49dbe67f168075508872b1704d9f61
diff --git a/share/cmake-3.22/Help/prop_tgt/CXX_EXTENSIONS.rst b/share/cmake-3.22/Help/prop_tgt/CXX_EXTENSIONS.rst
new file mode 100644
index 0000000..9b52504
--- /dev/null
+++ b/share/cmake-3.22/Help/prop_tgt/CXX_EXTENSIONS.rst
@@ -0,0 +1,21 @@
+CXX_EXTENSIONS
+--------------
+
+.. versionadded:: 3.1
+
+Boolean specifying whether compiler specific extensions are requested.
+
+This property specifies whether compiler specific extensions should be
+used. For some compilers, this results in adding a flag such
+as ``-std=gnu++11`` instead of ``-std=c++11`` to the compile line. This
+property is ``ON`` by default. The basic C++ standard level is
+controlled by the :prop_tgt:`CXX_STANDARD` target property.
+
+See the :manual:`cmake-compile-features(7)` manual for information on
+compile features and a list of supported compilers.
+
+This property is initialized by the value of
+the :variable:`CMAKE_CXX_EXTENSIONS` variable if set when a target is created
+and otherwise by the value of
+:variable:`CMAKE_CXX_EXTENSIONS_DEFAULT <CMAKE_<LANG>_EXTENSIONS_DEFAULT>` (see
+:policy:`CMP0128`).