Michael (XIAO Xufeng) cff1815177 idf_py: fix the ESPPORT environ variable type issue
Python 2 expect the environ variables are all of type 'str', but
sometimes wrong 'unicode' type is given.

Here we force all variables that are not str to become str.
2020-01-22 12:05:08 +08:00
..
2016-11-03 18:41:00 +08:00
2019-10-09 12:25:48 +08:00