dep-wait gnat-4.9 on mipsel

[Ludovic Brenta <ludovic@ludovic-brenta.org>]

dw gnat-4.9_4.9.0-1 . mipsel . -m gcc-4.9-source (>= 4.9.0-1)

The mipsel buildd attempted to build gnat-4.9 from the wrong version of
gcc-4.9-source.  The same happened on armel, for which I have already
requested a give-back.  Unlike on armel though, the new version of
gcc-4.9-source is still building and not available yet, so this is a
dep-wait request.

I will tighten the build-dependencies in future uploads to avoid a
repetition of this problem.

Other buildds succeeded.

Thanks

-- 
Ludovic Brenta.