build: Firmware-Version bei jedem Build neu erzeugen

NINLIGHT_FW_VERSION kam bisher aus einer configure-Zeit-Variable, die nur bei
erneutem CMake-Lauf aktualisiert wurde - nach einem Commit ohne Re-Konfiguration
zeigte Banner/system/info also eine veraltete Git-Version. cmake/write_version.cmake
schreibt build/generated/nl_version.h bei jedem Build frisch (add_custom_target ALL),
app_main.c/nl_app_api.c/nl_mdns.c inkludieren das Makro jetzt von dort statt aus
target_compile_definitions.

CMakeLists.txt

@@ -87,12 +87,13 @@ add_executable(${NL_FW} ${NL_SDK_BOOT_SOURCES} ${NL_FW_SOURCES} ${NL_SDK_OBJECTS
 set_target_properties(${NL_FW} PROPERTIES SUFFIX ".elf")
 target_compile_definitions(${NL_FW} PRIVATE
   NINLIGHT_DEVICE_ID="${NINLIGHT_DEVICE}"
-  NINLIGHT_FW_VERSION="${NINLIGHT_FW_VERSION}"
   NINLIGHT_BUILD_DATE="${NINLIGHT_BUILD_DATE}"
   NINLIGHT_TOKEN_DEFAULT="${NINLIGHT_TOKEN}"
   NINLIGHT_WIFI_SSID="${NINLIGHT_WIFI_SSID}"
   NINLIGHT_WIFI_PASSWORD="${NINLIGHT_WIFI_PASSWORD}"
   NINLIGHT_AP_PASSWORD="${NINLIGHT_AP_PASSWORD}")
+target_include_directories(${NL_FW} PRIVATE ${CMAKE_BINARY_DIR}/generated)
+add_dependencies(${NL_FW} nl_version)
 target_link_options(${NL_FW} PRIVATE
   -static -nostartfiles -T${SDK_DIR}/ld/link_w600_2m.ld
   -Wl,-Map=${CMAKE_BINARY_DIR}/${NL_FW}.map)
@@ -100,4 +101,4 @@ target_link_libraries(${NL_FW} PRIVATE
   -Wl,--whole-archive ${SDK_DIR}/Lib/GNU/libwlan.a -Wl,--no-whole-archive m)
 nl_add_images(${NL_FW})
 
-message(STATUS "ninlight ${NINLIGHT_FW_VERSION} for ${NINLIGHT_DEVICE}")
+message(STATUS "ninlight for ${NINLIGHT_DEVICE} (version regenerated at every build, see ${NL_VERSION_HEADER})")