Add ARM support

Adds support for scanning ARM backtraces so that kernel crash reporting
can work on ARM.

TEST=cat /sys/kernel/debug/preserved/kcrash > x
crash_reporter -generate_kernel_signature x
Verify that it finds a backtrace properly.

FEATURES=test emerge-x86-mario crash-reporter
- check all tests pass (this will run both ARM and X86 tests)

Change-Id: I4dc6d7a2bae53d05883da9425ec8e9ac4a5c2bba

Review URL:
3 files changed
tree: ad209cb3c96b9af8d3a022cb1d0d404a5c976772
  1. crash_reporter/