Reduce the size of native debug info generated by JIT.

Remove some ELF file overheads:
 - Do not produce program headers.
 - Do not page align strtab.
 - Do not write oat_patches sections.

This more than halves the size of JIT native debug info.
Since we generate many small entries, the overheads added up.

Change-Id: I27d95548c61e2e38c3683d6f5eb870a2db6e812d
4 files changed