Add c:gcclint recipe command

[hodgestar]

GCC produces warnings while compiling. It would be useful to provide support for parsing these and converting them to Bitten report via a recipe command.

[hodgestar]

Script for parsing gcc output into a Bitten lint report.

[hodgestar]

Discussion of parsing gcc warnings into a lint report started on the mailing list (​https://groups.google.com/d/topic/bitten/c3TJm6rcWUA/discussion) when Stefan Rupert posted an Awk script to perform the task. W Martin Borgert converted the Awk script to a Python one which Stefan then extended. I've attached the final script to this ticket for reference.

The chief difficulty in converting this to a Bitten recipe command is probably how to capture standard output from gcc (or otherwise get at the GCC warnings). One possibility is modifying c:make to perform this or to tee standard to another file. There may be better approaches.