Fix getting elf file from JIT_SYMFILE maps. am: 2d5c6a4e2f am: b55d4d9a71 am: cf3523a0b2 am: f3172f260e

Original change: https://android-review.googlesource.com/c/platform/system/unwinding/+/1956596

Change-Id: I0aed42393f035bfa477575dfdefb881ebe292378
tree: 8c1831b20de9279874a963545a8dafd43f3f97f2
  1. libbacktrace/
  2. libunwindstack/
  3. OWNERS
  4. PREUPLOAD.cfg