message: add comment about LC_CTYPE
diff: @@ -43,7 +43,7 @@ env:
  global:
  - OPENCV_VERSION=3.4.6
  - Atlas_ROOT_DIR=/usr/include/ # for cmake to find lapacke.h
  - - LC_CTYPE=C.UTF-8
  + - LC_CTYPE=C.UTF-8 # makes python3 locale.getpreferredencoding() return utf8 encoding instead of ansi
  before_script:
  - mkdir -p ~/build/opencv
  