Windows cmake warning on sqlite3_vendor

[brawner]

A new cmake warning has popped up after ci.ros2.org updated their warnings plugins. I could only find examples on Windows, but it appears to have been around for a bit, but was only found recently.

https://ci.ros2.org/view/nightly/job/nightly_win_rel/1490/

CMake Warning (dev) in CMakeLists.txt:

No project() command is present.  The top-level CMakeLists.txt file must contain 
a literal, direct call to the project() command.  Add a line of code such as 
project(ProjectName) near the top of the file, but after cmake_minimum_required(). 
CMake is pretending there is a "project(Project)" command on the first line.

[Karsten1987]

closed with #324