message: [cmake] update OT_LOG_LEVEL for debug build
  This commit also turns on OT_LOG_LEVEL_DYNAMIC to allow
  dynamic log level control.
diff: @@ -34,6 +34,14 @@ set(OT_COMMISSIONER ON CACHE BOOL "enable commissioner" FORCE)
  set(OT_DAEMON ON CACHE BOOL "enable daemon mode" FORCE)
  set(OT_JOINER ON CACHE BOOL "enable joiner" FORCE)
  set(OT_LEGACY ON CACHE STRING "enable legacy network support" FORCE)
  +
  +if (CMAKE_BUILD_TYPE STREQUAL "Debug")
  + set(OT_LOG_LEVEL "DEBG" CACHE STRING "set OpenThread log level to DEBG" FORCE)
  +else()
  + set(OT_LOG_LEVEL "INFO" CACHE STRING "set OpenThread log level to INFO" FORCE)
  +endif()
  +
  +set(OT_LOG_LEVEL_DYNAMIC ON CACHE BOOL "enable dynamic log level control" FORCE)
  set(OT_MAC_FILTER ON CACHE STRING "enable MAC filter" FORCE)
  set(OT_MBEDTLS_CONFIG_FILE "\"${PROJECT_SOURCE_DIR}/third_party/openthread/mbedtls-config.h\"" CACHE STRING "use mbedtls-config.h of this project" FORCE)
  set(OT_PLATFORM "posix" CACHE STRING "use posix platform" FORCE)
  @@ -47,8 +55,6 @@ add_subdirectory(repo EXCLUDE_FROM_ALL)
  target_compile_definitions(ot-config INTERFACE
  "-DOPENTHREAD_CONFIG_LOG_CLI=1"
  - "-DOPENTHREAD_CONFIG_LOG_LEVEL=OT_LOG_LEVEL_INFO"
  "-DOPENTHREAD_CONFIG_MAX_STATECHANGE_HANDLERS=3"
  "-DOPENTHREAD_CONFIG_MLE_STEERING_DATA_SET_OOB_ENABLE=1"
  )
  -
  