[PATCH] C-SKY: Fix machine flag.

[Nick Clifton]

Hi Mark,

> Note that this broke the build on all arches:
> https://builder.sourceware.org/buildbot/#/changes/17260

So it did.  Sorry about that.  It should now be fixed, but
it does leave me wondering why my test build did not pick
it up.  I must investigate.

Cheers
   Nick