Unicode support in get.py (espressif#781)

Localized versions of Linux systems use Unicode characters in the names of standard directories like "Downloads".

Author: Patas007

tools/get.py

@@ -24,7 +24,7 @@
 if 'Windows' in platform.system():
     import requests
 
-current_dir = os.path.dirname(os.path.realpath(__file__))
+current_dir = os.path.dirname(os.path.realpath(unicode(__file__)))
 dist_dir = current_dir + '/dist/'
 
 def sha256sum(filename, blocksize=65536):