Bug 594738: Use Interlocked* functions for PR_ATOMIC_* macros on MinGW. The patch is contributed by Jacek Caban <jacek@codeweavers.com>.  r=wtc.
Bug 594738: Use Interlocked* functions for PR_ATOMIC_* macros on MinGW.
The patch is contributed by Jacek Caban <jacek@codeweavers.com>.  r=wtc.

makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub,makotokato/nsprpub