codeparser: Add support for correct linenumbers

codeparser: Add support for correct linenumbers

Currently, if there is something like a python indentation error in a
python function, the linenumbers and even file aren't reported correctly.

This allows lineno and filename parameters to be passed in to correct this.

The lack of a lineno parameter to python's compile() function is worked
around by using empty linefeeds. Ugly, but effective and with minimal
performance overhead.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>