[Bug libstdc++/59087] Issues including complex.h in C++11/1y mode because of C's complex.h

[3dw4rd at verizon dot net]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59087

--- Comment #6 from Ed Smith-Rowland <3dw4rd at verizon dot net> ---
Strangely, head works: http://melpon.org/wandbox/permlink/CnsddYRxUohlCGF1
Although mine still gets the error.

I did something that might have helped for 4.9.  If I can prove that the fix
worked I might try to get it in 4.8.

Still investigating.