Bug#748323: blender: FTBFS on non-x86

[Rebecca N. Palmer]

Package: blender
Version: 2.70-2

blender tries to compile 
/«PKGBUILDDIR»/intern/cycles/kernel/kernel_sse2.cpp with SSE options, 
which is an error on non-x86:
c++: error: unrecognized command line option '-msse'
c++: error: unrecognized command line option '-msse2'
c++: error: unrecognized command line option '-mfpmath=sse'
(full log: 
https://buildd.debian.org/status/fetch.php?pkg=blender&arch=armhf&ver=2.70-2&stamp=1399859920 
)

It looks like intern/cycles/SConscript is where it decides whether to do 
this, but I haven't tried to turn it off yet.