Test: Ran benchmarks on host and device. Change-Id: I41b7d29bfa3468b9b9b8cbdfe94aca830d14f98e
In addition, move a couple of elf benchmarks out of unwind_benchmarks.cpp to the ElfBenchmarks.cpp file. Test: Ran benchmarks. Change-Id: I169f89f7b2dd6735568143f2176301e181fb8262