xianyi/OpenBLAS — pull request #443 by idunham (2014-08-28 20:14:39+00:00)
Title: Workaround PIC limitations in cpuid.

cpuid uses register ebx, but ebx is reserved in PIC.
So save ebx, swap ebx & edi, and return edi.
This fixes issue #442.

Copied from Igor Pavlov's equivalent fix for 7zip (in CpuArch.c),
which is public domain and thus OK license-wise.