[lldb][AArch64] Add register fields for Guarded Control Stack registers (#124295)

The features and locked registers hold the same bits, the latter
is a lock for the former. Tested with core files and live processes.

I thought about setting a non-zero lock register in the core file,
however:
* We can be pretty sure it's reading correctly because its between
  the 2 other GCS registers in the same core file note.
* I can't make the test case modify lock bits because userspace
can't clear them (without using ptrace) and we don't know what the libc
has locked
  (probably all feature bits).

0 files changed, 0 insertions, 0 deletions