Log all exceptions in upload.py (esp8266#8813)

Currently some exceptions cause a exit code 2, but without any relevant error message.

As an example, I had an issue with my USB drivers. But the only message I saw using the Arduino IDE was: uploading error: exit status 2. With this code change I could see a more specific Resource busy error message, which helped me identify the actual problem.

tools/upload.py

@@ -65,7 +65,7 @@
 
 try:
     esptool.main(cmdline)
-except esptool.FatalError as e:
+except Exception as e:
     sys.stderr.write('\nA fatal esptool.py error occurred: %s' % e)
 finally:
     if erase_file: