RFC: line endings and specs parser

[Mumit Khan]

Now that GCC is slowly but surely moving towards dealing with the various
types of EOLs (thanks Zack!), what do folks think about fixing specs parser 
to do the same?

The problem is that the gcc.c:read_specs() doesn't use stdio to read the
file, so all the usual conversions don't happen.

My first attempt was to do graft it on top of existing code, but the code 
became extremely hard to read.

My second attempt worked much better, but at the expense of a bit of
memory and some processing overhead. After reading the specs using
read(), I allocate a 2nd buffer, copy the 1st onto 2nd using the 
following simple logic:

  for each character in input buffer,
    - if '\r', transform to '\n'.
      - if next character is '\n', advance input pointer (ie, just skip).
    - copy to output buffer

This should handle EOL styles of \n, \r\n and \r.

Comments? Is this worth it?

Regards,
Mumit