Move .oat files to ELF format

Generates .oat in ELF file format using MCLinker
- Uses MCLinker IRBuilder to create a synthetic .o from OatWriter output.
- Uses new ElfFile for prelinking to support art image optimizations.

Adapted OatFile to load using dlopen, ElfFile, or memory, removing raw MemMap mechanism.

Changed image code to not assume oat data will be immediately after
image to allow space for ELF headers.

Passes test-art and works with installd.

Change-Id: Idc026eddb5de93f4b97490c405f3ed7b39589749
34 files changed
tree: 6b9d8d93a70e31dba3b0a880f886ce408776314c
  1. .gitignore
  3. build/
  4. jdwpspy/
  5. src/
  6. test/
  7. tools/