Simpleperf: add vaddr_in_file sort key in report command.

Currently report command can't report more details than function name.
After adding vaddr_in_file sort key, it can report the place of the
instruction being sampled. vaddr_in_file is the instruction's virtual
address in elf file, which matches output generated by objdump.

Bug: 29826956
Test: run simpleperf_unit_test.
Change-Id: Ifad4dfb7c60014a03c01ffbfd0b972858f1a4884
12 files changed