Add LOWPOWERTIMER capability for NUCLEO_F303ZE

Author: jeromecoutant

targets/targets.json

@@ -758,9 +758,9 @@
         "inherits": ["Target"],
         "detect_code": ["0747"],
         "macros": ["TRANSACTION_QUEUE_SIZE_SPI=2"],
-        "device_has": ["ANALOGIN", "ANALOGOUT", "CAN", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH", "STDIO_MESSAGES"],
+        "device_has": ["ANALOGIN", "ANALOGOUT", "CAN", "I2C", "I2CSLAVE", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SLEEP", "SPI", "SPISLAVE", "SPI_ASYNCH", "STDIO_MESSAGES", "LOWPOWERTIMER"],
         "release_versions": ["2", "5"],
-        "device_name": "STM32F303RE"
+        "device_name": "STM32F303ZE"
     },
     "NUCLEO_F334R8": {
         "supported_form_factors": ["ARDUINO", "MORPHO"],