I propose to change compel directory structure:
- if we want support more arch's than x86/ppc66, it seems
  worth to add arch/ folder
- move all sources from src/ folder up
- to have headers and build additional object with CFLAGS for
  a symlink seems for me less hacky way than mess around
  with .c files cross-linking
- I made handle-elf.h header for arch helpers code. I may named
  that just "elf.h", but that may confuse, as there are <elf.h>
  system header
- I would like to drop those ELF_PPC64/ELF_X86_32/ELF_X86_64
  defines and use CONFIG_X86_64 and whatnot

After this patch compel directory become:
compel/
├── arch
│   ├── ppc64
│   │   └── include
│   │       └── handle-elf.h
│   └── x86
│       └── include
│           └── handle-elf.h
├── handle-elf-32.c -> handle-elf.c
├── handle-elf.c
├── include
│   ├── piegen.h
│   └── uapi
│       ├── elf32-types.h
│       ├── elf64-types.h
│       └── types.h
├── main.c
└── Makefile

Note: temporary I make value32 and addend32 for compilation on arm/aarch64

Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Acked-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>