am ed8ddd2d: Merge changes from topic \'art_unwinding_64bit_and_inprocess\' into mnc-dev

* commit 'ed8ddd2dc0e554ac4c32ccef3687bc04de046cfd':
  Change return type of get_load_offset to bool.
  Support x86-64 floating point registers.
  Enable .debug_frame support on all platforms.