debug/elf: add machine and OSABI constants
debug/elf: add machine and OSABI constants

Provide a complete list of EM_* and ELFOSABI_* constants.

Compiled from the tables at
http://www.sco.com/developers/gabi/latest/ch4.eheader.html
and llvm/BinaryFormat/ELF.h from LLVM.

Change-Id: Ice1e1476076fafdb8bb8af848caec6d80a82c452
Reviewed-on: https://go-review.googlesource.com/112115
Run-TryBot: Tobias Klauser <0a68dd4915066ec5d3f81f75a828fee53dcc8822@gmail.com>
Reviewed-by: Ian Lance Taylor <87e9c6d529889242b7e184afb632328636553ab4@golang.org>
TryBot-Result: Gobot Gobot <66cb808b70d30c07676d5e946fee83fd561249e5@golang.org>

nawawi/go,josharian/go,golang/go,CAFxX/go,golang/go,nawawi/go,golang/go,cloudflare/go,cloudflare/go,josharian/go,josharian/go,CAFxX/go,cloudflare/go,golang/go,cloudflare/go,nawawi/go,nawawi/go,cloudflare/go,golang/go,nawawi/go,CAFxX/go,akutz/go,cloudflare/go,cloudflare/go,CAFxX/go,nawawi/go,CAFxX/go,golang/go,akutz/go,josharian/go,nawawi/go,akutz/go,golang/go,akutz/go,cloudflare/go,josharian/go,akutz/go,akutz/go,josharian/go,josharian/go,josharian/go,golang/go,akutz/go,CAFxX/go,nawawi/go,CAFxX/go,akutz/go,CAFxX/go