Bug#805893: clblas: add -mxgot option to CFLAGS and CXXFLAGS for mips*64{el}

[Ghislain Vaillant]

Hi YunQiang Su,

Thanks for reporting this and providing a patch with some explanation of 
what it does.

Just to be sure, when you say:

> I also add the same extra options to CXXFLAGS as CFLAGS.
> This patch can fix FTBFS on mips64el.

Do you mean the patch fixes the issue *for sure*, or is it just a guess?

Usage of "can" is not particularly assertive, hence me asking for a 
confirmation.

Cheers,
Ghis