[Bug bootstrap/69506] [6 Regression] check-in 232454 seems to cause problems with cygwin builds

[rogero at howzatt dot demon.co.uk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69506

--- Comment #3 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
Tested: bootstrap build on cygwin with your patch completed successfully.

I used:
../gcctrunk/configure --enable-languages=c,c++ --prefix=/usr/share/gcc-trunk
make -j5
make install

Thank you :-)