winbase.h: Make Interlocked* wrappers formatting more readable.

git-svn-id: svn+ssh://svn.code.sf.net/p/mingw-w64/code/trunk@6328 4407c894-4637-0410-b4f5-ada5f102cad1
winbase.h: Fixed Interlocked* wrappers on Cygwin64.

git-svn-id: svn+ssh://svn.code.sf.net/p/mingw-w64/code/trunk@6329 4407c894-4637-0410-b4f5-ada5f102cad1