libsanitizer: introduce calls forwarding mechanism.

libsanitizer: introduce calls forwarding mechanism.

    * libsanitizer/sanitizer_common/Makefile.am: add file
    sanitizer_forward_calls.cc
    * libsanitizer/sanitizer_common/Makefile.in: regenerated
    * libsanitizer/sanitizer_common/sanitizer_forward_calls.cc: new file,
    implementation of calls forwarding interface
    * libsanitizer/sanitizer_common/sanitizer_forward_calls.h: new file,
    macro MAYBE_FORWARD_TO_REAL used in interceptors
    * libsanitizer/sanitizer_common/sanitizer_interface_internal.h:
    add declarations of interface functions for enabling/disabling
    interceptors
    * libsanitizer/sanitizer_common/sanitizer_internal_defs.h: add
    SANITIZER_CALLS_FORWARDING macro

Change-Id: I41367e63283798920a4cabc8a01f0192146b9057
Signed-off-by: Andrey Drobyshev <a.drobyshev@samsung.com>