pthread: unit test builds only necessary components

components/pthread/test_apps/pthread_unity_tests/CMakeLists.txt

@@ -5,4 +5,5 @@ cmake_minimum_required(VERSION 3.16)
 set(EXTRA_COMPONENT_DIRS "$ENV{IDF_PATH}/tools/unit-test-app/components")
 
 include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+set(COMPONENTS main)
 project(test_pthread)