[Bug target/69988] libgo.so: undefined reference to `__unorddf2'

[glaubitz at physik dot fu-berlin.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69988

--- Comment #1 from John Paul Adrian Glaubitz <glaubitz at physik dot 
fu-berlin.de> ---
Full build log here:

> https://people.debian.org/~glaubitz/gcc-5_5.2.1-14_powerpcspe-20160226-2238.build