set log level for LOG_LOCAL_LEVEL

otherwise log functions like ESP_LOG_BUFFER_HEXDUMP will not use
the defined log level

Signed-off-by: Christian Ambach <christian.ambach@deutschebahn.com>

platformio.ini

@@ -58,6 +58,7 @@ build_flags =
     -w
     '-DARDUINO_LMIC_PROJECT_CONFIG_H=../../../src/lmic_config.h'
     '-DCORE_DEBUG_LEVEL=${common.debug_level}'
+    '-DLOG_LOCAL_LEVEL=${common.debug_level}'
     '-DBINTRAY_PACKAGE="${PIOENV}"'
     '-DPROGVERSION="${common.release_version}"'