Dump framework newline cleanup

[Teresa Johnson <tejohnson at google dot com>]

I've attached a patch that implements the cleanup of newline emission
by the new dump framework as discussed here:

http://gcc.gnu.org/ml/gcc-patches/2013-08/msg01779.html

Essentially, I have removed the leading newline emission from
dump_loc, and updated dump_printf_loc invocations to emit a trailing
newline as necessary. This will remove unnecessary vertical space in
the dump output.

I did not do any other cleanup of the existing vectorization messages
- there are IMO a lot of messages being emitted by the vectorizer
under MSG_NOTE (and probably MSG_MISSED_OPTIMIZATION) that should only
be emitted to the dump file under -fdump-tree-... and not emitted
under -fopt-info-all. The ones that stay under -fopt-info-all need
some formatting/style cleanup. Leaving that for follow-on work.

Bootstrapped and tested on x86-64-unknown-linux-gnu. Ok for trunk?

Thanks,
Teresa

-- 
Teresa Johnson | Software Engineer | tejohnson@google.com | 408-460-2413

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