r195676 - Make the integrated assembler the default for cygwin/mingw too.

[Anton Korobeynikov]

> To give an error to -no-integrated-as, could you file bugzilla for
> this issue, "incompatibilities to gnu as"?
> (llc is already affected.)
And if these incompatibilities are due to bugs in GNU as - please fill
the bugs in binutils bugzilla as well. Somehow there were no problems
with using GNU as for ages and now they apparently occurred...

-- 
With best regards, Anton Korobeynikov
Faculty of Mathematics and Mechanics, Saint Petersburg State University