Refactor `_output_cv_symbol_align`

`_output_cv_symbol_align` is a subject of some issues:
* [Issue 2436 - Unexpected OPTLINK termination EIP = 00425303 with /co](http://d.puremagic.com/issues/show_bug.cgi?id=2436) [FIXED]
* [Issue 6144 - Unexpected OPTLINK Termination at EIP=00428DA3](http://d.puremagic.com/issues/show_bug.cgi?id=6144) [NEW]

It would be good to have it in readable state which this pull does.

#### Note:
The pull is tested for binary equality of files produced by optlink to ensure it's a correct refactoring however any mistakes may occur.