Experimental: recycle the `import std` UUID

Now that GCC is supported, update the feature UUID.

Help/dev/experimental.rst

@@ -81,7 +81,7 @@ In order to activate support for ``import std`` in C++23 and newer targets,
 set
 
 * variable ``CMAKE_EXPERIMENTAL_CXX_IMPORT_STD`` to
-* value ``0e5b6991-d74f-4b3d-a41c-cf096e0b2508``.
+* value ``a9e1cf81-9932-4810-974b-6eccaf14e457``.
 
 This UUID may change in future versions of CMake.  Be sure to use the value
 documented here by the source tree of the version of CMake with which you are

Source/cmExperimental.cxx

@@ -39,7 +39,7 @@ cmExperimental::FeatureData LookupTable[] = {
     false },
   // CxxImportStd
   { "CxxImportStd",
-    "0e5b6991-d74f-4b3d-a41c-cf096e0b2508",
+    "a9e1cf81-9932-4810-974b-6eccaf14e457",
     "CMAKE_EXPERIMENTAL_CXX_IMPORT_STD",
     "CMake's support for `import std;` in C++23 and newer is experimental. It "
     "is meant only for experimentation and feedback to CMake developers.",

Tests/RunCMake/CXXModules/examples/import-std-export-no-std-build/CMakeLists.txt

@@ -1,5 +1,5 @@
 set(CMAKE_EXPERIMENTAL_CXX_IMPORT_STD
-  "0e5b6991-d74f-4b3d-a41c-cf096e0b2508")
+  "a9e1cf81-9932-4810-974b-6eccaf14e457")
 
 cmake_minimum_required(VERSION 3.29)
 project(cxx_modules_import_std_export_no_std CXX)

Tests/RunCMake/CXXModules/examples/import-std-export-no-std-install/CMakeLists.txt

@@ -1,5 +1,5 @@
 set(CMAKE_EXPERIMENTAL_CXX_IMPORT_STD
-  "0e5b6991-d74f-4b3d-a41c-cf096e0b2508")
+  "a9e1cf81-9932-4810-974b-6eccaf14e457")
 
 cmake_minimum_required(VERSION 3.29)
 project(cxx_modules_import_std_export_no_std CXX)

Tests/RunCMake/CXXModules/examples/import-std-no-std-property/CMakeLists.txt

@@ -1,5 +1,5 @@
 set(CMAKE_EXPERIMENTAL_CXX_IMPORT_STD
-  "0e5b6991-d74f-4b3d-a41c-cf096e0b2508")
+  "a9e1cf81-9932-4810-974b-6eccaf14e457")
 
 cmake_minimum_required(VERSION 3.29)
 project(cxx_modules_import_std_no_std_property CXX)

Tests/RunCMake/CXXModules/examples/import-std-not-in-export-build/CMakeLists.txt

@@ -1,5 +1,5 @@
 set(CMAKE_EXPERIMENTAL_CXX_IMPORT_STD
-  "0e5b6991-d74f-4b3d-a41c-cf096e0b2508")
+  "a9e1cf81-9932-4810-974b-6eccaf14e457")
 
 cmake_minimum_required(VERSION 3.29)
 project(cxx_modules_import_std_not_in_export CXX)

Tests/RunCMake/CXXModules/examples/import-std-not-in-export-install/CMakeLists.txt

@@ -1,5 +1,5 @@
 set(CMAKE_EXPERIMENTAL_CXX_IMPORT_STD
-  "0e5b6991-d74f-4b3d-a41c-cf096e0b2508")
+  "a9e1cf81-9932-4810-974b-6eccaf14e457")
 
 cmake_minimum_required(VERSION 3.29)
 project(cxx_modules_import_std_not_in_export CXX)

Tests/RunCMake/CXXModules/examples/import-std-transitive/CMakeLists.txt

@@ -1,5 +1,5 @@
 set(CMAKE_EXPERIMENTAL_CXX_IMPORT_STD
-  "0e5b6991-d74f-4b3d-a41c-cf096e0b2508")
+  "a9e1cf81-9932-4810-974b-6eccaf14e457")
 
 cmake_minimum_required(VERSION 3.29)
 

Tests/RunCMake/CXXModules/examples/import-std/CMakeLists.txt

@@ -1,5 +1,5 @@
 set(CMAKE_EXPERIMENTAL_CXX_IMPORT_STD
-  "0e5b6991-d74f-4b3d-a41c-cf096e0b2508")
+  "a9e1cf81-9932-4810-974b-6eccaf14e457")
 
 cmake_minimum_required(VERSION 3.29)
 project(cxx_modules_import_std CXX)

Tests/RunCMake/cmake_language/Experimental/CxxImportStd-set.cmake

@@ -1,5 +1,5 @@
 set(CMAKE_EXPERIMENTAL_CXX_IMPORT_STD
-  "0e5b6991-d74f-4b3d-a41c-cf096e0b2508")
+  "a9e1cf81-9932-4810-974b-6eccaf14e457")
 
 cmake_language(GET_EXPERIMENTAL_FEATURE_ENABLED
   "CxxImportStd"