simpleperf debug-unwind: add --skip-sample-print option.

When unwinding all samples in a record file, printing samples
may take a lot of time. So skip it when not needed.

Bug: none
Test: run simpleperf_unit_test.
Change-Id: Ib5801aa8eb8b931bd56aba5c717cf37b45e984c1
2 files changed