[hwasan] Record and display stack history in stack-based reports.

[hwasan] Record and display stack history in stack-based reports.

Summary:
Display a list of recent stack frames (not a stack trace!) when
tag-mismatch is detected on a stack address.

The implementation uses alignment tricks to get both the address of
the history buffer, and the base address of the shadow with a single
8-byte load. See the comment in hwasan_thread_list.h for more
details.

Developed in collaboration with Kostya Serebryany.

Reviewers: kcc

Subscribers: srhines, kubamracek, mgorny, hiraditya, jfb, llvm-commits

Differential Revision: https://reviews.llvm.org/D52249

llvm-svn: 342923