[compiler-rt] libhwasan interceptor ABI intercept longjmp/setjmp

Summary:
The hwasan interceptor ABI doesn't have interceptors for longjmp and setjmp.
This patch introduces them.

We require the size of the jmp_buf on the platform to be at least as large as
the jmp_buf in our implementation. To enforce this we compile
hwasan_type_test.cpp that ensures a compile time failure if this is not true.

Tested on both GCC and clang using an AArch64 virtual machine.

Reviewers: eugenis, kcc, pcc, Sanatizers

Reviewed By: eugenis, Sanatizers

Tags: #sanatizers, #llvm

Differential Revision: https://reviews.llvm.org/D69045

Patch By: Matthew Malcomson <matthew.malcomson@arm.com>