autodetect line endings

Aleksandr Mezin requested to merge amezin/glib:fix-data-to-c-line-endings into master

When GLib code is checked out with Windows line endings (happens on Windows), embedded that line endings into generated string literal. And then they translated to double newlines in glib-compile-resources output.

clang-cl failed to compile such files because of empty lines in the middle of multiline macros:

#define G_MSVC_CTOR(_func,_sym_prefix) \

  static void _func(void); \

To fix the issue, enable 'universal newlines' mode when reading the input in - translate both '\n' and '\r\n' to '\n'.

Fixes #2340 (closed)

Edited by Aleksandr Mezin

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