Add LLCoros::TempStatus instances around known suspension points so
printActiveCoroutines() can report what each suspended coroutine is waiting
for.

Similarly, sprinkle checkStop() calls at known suspension points.

Make LLApp::setStatus() post an event to a new LLEventPump "LLApp" with a
string corresponding to the status value being set, but only until
~LLEventPumps() -- since setStatus() also gets called very late in the
application's lifetime.

Make postAndSuspendSetup() (used by postAndSuspend(), suspendUntilEventOn(),
postAndSuspendWithTimeout(), suspendUntilEventOnWithTimeout()) add a listener
on the new "LLApp" LLEventPump that pushes the new LLCoros::Stopping exception
to the coroutine waiting on the LLCoros::Promise. Make it return the new
LLBoundListener along with the previous one.

Accordingly, make postAndSuspend() and postAndSuspendWithTimeout() store the
new LLBoundListener returned by postAndSuspendSetup() in a LLTempBoundListener
(as with the previous one) so it will automatically disconnect once the wait
is over.

Make each LLCoprocedurePool instance listen on "LLApp" with a listener that
closes the queue on which new work items are dispatched. Closing the queue
causes the waiting dispatch coroutine to terminate. Store the connection in an
LLTempBoundListener on the LLCoprocedurePool so it will disconnect
automatically on destruction.

Refactor the loop in coprocedureInvokerCoro() to instantiate TempStatus around
the suspending call.

Change a couple spammy LL_INFOS() calls to LL_DEBUGS(). Give all logging calls
in that module a "CoProcMgr" tag to make it straightforward to re-enable the
LL_DEBUGS() calls as desired.

Pass LL_BUGSPLAT into llapp.cpp compile to be able to detect that.

Use WSTRINGIZE(), LL_TO_WSTRING(), wstringize() to produce required wide
strings. Use a lambda for callback that sends log file; use LLDir, if set, to
find the log file.

Introduce BUGSPLAT CMake variable to allow suppressing BugSplat.
Make BUGSPLAT CMake variable set LL_BUGSPLAT for C++ compilations.

Set viewer version macros on llappviewerwin32.cpp, llappviewerlinux.cpp and
llappdelegate-objc.mm -- because BugSplat needs the viewer version data, and
because the macOS BugSplat hook is engaged in an Objective-C++ function we
override in the app delegate.

painfully add in the path to the second life log file that we also send - painful because of string <--> wstring issues

First pass at adding BugSplat code to viewer and turning off existing (Google Breakpad) exception handling

MAINT-6322 fix merge error that prevented crash dumps from being located for upload (and add better logging)

MAINT-6322 fix merge error that prevented crash dumps from being located for upload (and add better logging)

and use it for existing LLSomeClass::cleanupClass() calls.
This logs the fact of making the call, as well as making it.

Fixes for crash reporter startup race condition, crash reporter CPU use, Secondlife.log filehandle, XP Crash.

replace llinfos, lldebugs, etc with new LL_INFOS(), LL_DEBUGS(), etc.

Revert previous change because breakpad's ExceptionHandler class has different API on diff platforms