CMake: Fix project definition

We were defining the top level CMake project after adding dependencies,
this caused CMake to think mbed-os was the current project.

Author: rwalton-arm

CMakeLists.txt

@@ -9,6 +9,8 @@ set(APP_TARGET mbed-os-example-for-aws)
 
 include(${MBED_PATH}/tools/cmake/app.cmake)
 
+project(${APP_TARGET})
+
 add_subdirectory(${MBED_PATH})
 add_subdirectory(mbed-client-for-aws)
 
@@ -20,8 +22,6 @@ add_executable(${APP_TARGET})
 
 mbed_configure_app_target(${APP_TARGET})
 
-project(${APP_TARGET})
-
 target_include_directories(${APP_TARGET}
     PRIVATE
         .