serial: set up serial from cmake

Don't need to replace the qemu rules from zephyr with a script.

Author: tylerwhall

samples/rust-app-serial/CMakeLists.txt

@@ -3,6 +3,7 @@
 cmake_minimum_required(VERSION 3.13.1)
 get_filename_component(ZEPHYR_RUST ${CMAKE_CURRENT_SOURCE_DIR}/../.. ABSOLUTE)
 list(APPEND ZEPHYR_MODULES ${ZEPHYR_RUST})
+list(APPEND QEMU_EXTRA_FLAGS -serial tcp:localhost:4444,server,nowait)
 include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
 project(hello_world)
 target_sources(app PRIVATE ./src/main.c)

samples/rust-app-serial/README.rst

@@ -11,10 +11,9 @@ Run
 ===
 
 .. code-block:: console
-    sh ../run.sh
+    ninja run
 
-A `run.sh` script has been provided which adds the following line to the qemu
-command:
+CMakeLists.txt adds the following line to the qemu command:
 
 .. code-block:: console
     -serial tcp:localhost:4444,server,nowait