Fix parsing of cpuinfo for s390 platform. (#712)
Fix parsing of cpuinfo for s390 platform. (#712)

s390 has another line structure for processor-field.
It should be differently parsed.

google/benchmark,google/benchmark,mockingbirdnest/benchmark,mockingbirdnest/benchmark,mockingbirdnest/benchmark,google/benchmark,mockingbirdnest/benchmark