Merge pull request #400 from ChazJin/patch-1

Add GD32F450ZI to platform database

Author: bridadan

mbed_lstools/platform_database.py

@@ -225,6 +225,7 @@
         u'1600': u'LPC4330_M4',
         u'1605': u'LPC4330_M4',
         u'1701': u'GD32_F307VG',
+        u'1702': u'GD32_F450ZI',
         u'2000': u'EFM32_G8XX_STK',
         u'2005': u'EFM32HG_STK3400',
         u'2010': u'EFM32WG_STK3800',