Revert "ART: Prepare for ELF64."

Build fails on arm64 with error message:
art/compiler/elf_writer_quick.cc:1083:1: error: the frame size of 2016 bytes is larger than 1728 bytes [-Werror=frame-larger-than=]

This reverts commit 45b8f1ab2782d02830c77751f883456de799dfb6.

Change-Id: I61b2e5f27ba4b2b32eacaec51fb5e5ed12fd8066
3 files changed