issue deprecation warning on use of google/ headers
added tc_malloc_skip_new_handler

This is port of corresponding chromium change at:
https://codereview.chromium.org/55333002/

Basic idea is that sometimes apps that use tc_set_new_mode in order to
have C++ out-of-memory handler catch OOMs in malloc, need to invoke
usual malloc that returns 0 on OOM.

That new API is exactly for that. It'll always return NULL on OOM even
if tc_new_mode is set to true.
issue-614: use tc_memalign in ReallocAfterMemalloc test

Because some OSes lack plain memalign. And we really need to test our
implementation which is always available via tc_malloc.