Distributions starts to supply GCC that is configured to compile
-pie and -fPIC code by default due to security reasons.

CONFIG_COMPAT was unfriendy to -pie by the reason of R_X86_64_32S
relocation in call32.S helper:
  LINK     criu/criu
/usr/bin/ld: criu/arch/x86/crtools.built-in.o: relocation R_X86_64_32S against `.text' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: final link failed: Nonrepresentable section on output
collect2: error: ld returned 1 exit status
make[1]: *** [criu/Makefile:92: criu/criu] Error 1
make: *** [Makefile:225: criu] Error 2

Use %rip-relative addressing to avoid ld errors for shared binary linking.
Puff, all needs to be done with bare hands!

Now CONFIG_COMPAT can be used with -pie binaries and all should
also work for debian toolchain (#315).
Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>