MOZ_LOG_*DEBUG_ONLY() and pretty printers of bool

[Masayuki Nakano]

For the performance sensitive paths or privacy concerns, you may want to enable `MOZ_LOG` only in debug builds. In this case, you can now use:

• MOZ_LOG_DEBUG_ONLY(...)
• MOZ_LOG_DURATION_DEBUG_ONLY(...)
• MOZ_LOG_FMT_DEBUG_ONLY(...)

These macros put corresponding macro only when `#ifdef DEBUG`.

Additionally, new bool pretty printers are shipped together.

• TrueOrFalse(bool)
• YesOrNo(bool)
• OnOrOff(bool)
• SucceededOrFailed(bool)
• OkOrError(bool)
• DoneOrIgnored(bool)
• HandledOrIgnored(bool)
• DoneOrCanceled(bool)
• HandledOrCanceled(bool)

They are defined with new `MOZ_DEFINE_BOOL_PRETTY_PRINTER()` macro. Therefore, if you want another version of bool pretty printer, you can define it in proper scope like this.

-- 
Masayuki Nakano <masa...@d-toybox.com>
Working on DOM, Events, editor and IME handling for Gecko