Fix getting elf file from JIT_SYMFILE maps.

For maps with MAPS_FLAGS_JIT_SYMFILE_MAP, the map range
is for a JIT function, which can be smaller than elf header size.
To get elf file from those maps, increase map_size to make sure
we can read elf header.

Bug: 215556268
Test: run libunwindstack_unit_test

Change-Id: Ib549f02c8ea806598ddb4319c655705227e36e16
2 files changed
tree: d8f4297043092850676118592861959dd1f3130a
  1. libbacktrace/
  2. libunwindstack/
  3. OWNERS
  4. PREUPLOAD.cfg