pw_sync_freertos: Add CMake support

Change-Id: I7c765f12c07fd607e74bc48fc199fb199c818d4c
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/86740
Pigweed-Auto-Submit: Ewout van Bekkum <ewout@google.com>
Reviewed-by: Armando Montanez <amontanez@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d75967c..83c369b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -65,9 +65,10 @@
 add_subdirectory(pw_status EXCLUDE_FROM_ALL)
 add_subdirectory(pw_stream EXCLUDE_FROM_ALL)
 add_subdirectory(pw_string EXCLUDE_FROM_ALL)
-add_subdirectory(pw_sync_zephyr EXCLUDE_FROM_ALL)
 add_subdirectory(pw_sync EXCLUDE_FROM_ALL)
+add_subdirectory(pw_sync_freertos EXCLUDE_FROM_ALL)
 add_subdirectory(pw_sync_stl EXCLUDE_FROM_ALL)
+add_subdirectory(pw_sync_zephyr EXCLUDE_FROM_ALL)
 add_subdirectory(pw_sys_io_zephyr EXCLUDE_FROM_ALL)
 add_subdirectory(pw_sys_io EXCLUDE_FROM_ALL)
 add_subdirectory(pw_sys_io_stdio EXCLUDE_FROM_ALL)