Unifiy the comments of preprocessor conditionals

[akosthekiss]

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

[akosthekiss]

As discussed at #1015 . This is not necessarily the final version, but consistent at least.

Why I'm saying it's not necessarily the final version: the comments after #endifs look sometimes weird if preceeded by an #else or #elif preprocessor directive. One could argue that the final comment of an #endif could repeat that of its directly preceeding directive, i.e., not necessarily the predicate of the #if. E.g.,

#ifdef XXX
#endif /* XXX */

#ifndef XXX
#endif /* !XXX */

#if XXX
#elif YYY
#elif ZZZ
#else /* !XXX && !YYY & !ZZZ */
#endif /* !XXX && !YYY & !ZZZ */

But that's really just a matter of style. Right now, the PR goes with the originally suggested style. Happy to change it however the reviewers vote. Just let's get it consitent.

[zherczeg]

This is ok for me. LGTM

[LaszloLango]

Thanks for cleaning up this. LGTM