add cmake for rx

Author: Scott Larson

ports/rxv2/gnu/CMakeLists.txt

@@ -0,0 +1,18 @@
+
+target_sources(${PROJECT_NAME}
+    PRIVATE
+    # {{BEGIN_TARGET_SOURCES}}
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_context_restore.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_context_save.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_interrupt_control.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_schedule.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_stack_build.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_thread_system_return.S
+	${CMAKE_CURRENT_LIST_DIR}/src/tx_timer_interrupt.S
+    # {{END_TARGET_SOURCES}}
+)
+
+target_include_directories(${PROJECT_NAME}
+    PUBLIC
+    ${CMAKE_CURRENT_LIST_DIR}/inc
+)