Change to release build

Author: JcZou

target/infineon/edge-e83/m55/rtconfig.py

@@ -31,7 +31,7 @@
 if os.getenv('RTT_EXEC_PATH'):
     EXEC_PATH = os.getenv('RTT_EXEC_PATH')
 
-BUILD = 'debug'
+BUILD = 'release'
 
 if PLATFORM == 'gcc':
     # toolchains