Statically link libc++ to relocation_packer in
order to make it work from prebuilts
Bug: http://b/18051137
Change-Id: I933ed6a0e48780a26b261069eb6a293432824fe7
1. One binary for all architectures
2. Generalize (and slightly improve) compression
2.1 works on all relocation types (rela?.dyn section only so far)
2.2 Uses same format to encode ElfW(Rel) as well as ElfW(Rela) tables
Bug: 18051137
Change-Id: I66c95d9076954ca115816fc577d0f5ef274e5e72