Extract the reliability sensitive piece of code from OpenBLAS

[ssvb]

The linpack benchmark based on OpenBLAS appears to be quite sensitive to DVFS operating points misconfiguration (insufficient voltage) on ARM Cortex-A53 [1][2].

We need to identify the reliability critical part in it and make an easy to use reduced test. Most likely it is one of the assembly optimized functions:

• https://github.com/xianyi/OpenBLAS/tree/develop/kernel/arm
• https://github.com/xianyi/OpenBLAS/tree/develop/kernel/arm64