Transformation of contrib/check_GNU_style.sh to a python script

[Florian Weimer]

* Martin Liška:

>                 validate(pfile.target_file.lstrip('b/'), line.target_line_no, line.value)

Violates line length constraint. :)

My own egrep script also checks for/switch/if/while/do on the same
line as "{", and "(" not preceded by whitespace (currently has false
positves with the definition of function-like macros, among other
things).