Update OpenAL-soft to 1.23.1-bc7cb17.

libs/openal-soft/tests/CMakeLists.txt

@@ -0,0 +1,24 @@
+add_executable(OpenAL_Tests)
+
+include(FetchContent)
+FetchContent_Declare(
+  googletest
+  GIT_REPOSITORY https://github.com/google/googletest.git
+  GIT_TAG        main
+)
+# For Windows: Prevent overriding the parent project's compiler/linker settings
+set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
+FetchContent_MakeAvailable(googletest)
+
+target_link_libraries(OpenAL_Tests PRIVATE
+	OpenAL
+	GTest::gtest_main
+)
+
+target_sources(OpenAL_Tests PRIVATE
+example.t.cpp
+)
+
+# This needs to come last
+include(GoogleTest)
+gtest_discover_tests(OpenAL_Tests)