Fix performance-for-range-copy warnings

Bug: 30413223
Test: make with WITH_TIDY=1 DEFAULT_GLOBAL_TIDY_CHECKS=-*,performance*
Change-Id: I3ad102f2b0f971266d57488a3bd57d312f7ee3e6
2 files changed
tree: 6a8d07515cb0209a8a8464295db98e4be760d1f0
  1. libbacktrace/
  2. libunwindstack/