adding host/cdc_msc_hid_freertos example

examples/host/cdc_msc_hid/CMakeLists.txt

@@ -10,6 +10,11 @@ project(${PROJECT} C CXX ASM)
 # Checks this example is valid for the family and initializes the project
 family_initialize_project(${PROJECT} ${CMAKE_CURRENT_LIST_DIR})
 
+# Espressif has its own cmake build system
+if(FAMILY STREQUAL "espressif")
+  return()
+endif()
+
 add_executable(${PROJECT})
 
 # Example source