[Bug testsuite/90696] fixinclude test failures--- sys/ucred.h

[democritus7 at att dot net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90696

--- Comment #2 from dllbrt <democritus7 at att dot net> ---
This failure occurred with two build configurations, a generic one and
../gcc-6.4.0/configure --prefix=/usr
--enable-languages=ada,c,c++,fortran,,go,java,objc,obj-c++ --enable-lto
--enable-__cxa_atexit --enable-build-with-cxx --with-long-double=128
--enable-decimal-float --enable-static-libjava --with-x --enable-gtk-cairo
--enable-checking=yes

The build and testing were done on i686 Mageia 6 Linux on an i5 system, target
same.