Something fishy with the toolchain in unstable

Hi,

I noticed that recent uploads of iceweasel 38 to unstable failed to
build on mips/mipsel on a libjpeg-turbo file that:
- built fine in previous versions of iceweasel 38
- built fine in a stretch backport of the current version of iceweasel
  from unstable
- built fine when built in the libjpeg-turbo package on buildds
- but failed to build in libjpeg-turbo on a mips porterbox

The build error manifests itself in the form of multiple lines of the
form:
jsimd_mips_dspr2.S:<line>: Error: float register should be even, was <odd
number>

I wish I could test a downgrade of binutils in the schroot on the porter
box, but I can't.

Could someone please look into this?

Thanks,

Mike

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