Make sure momentary breakpoints are always thread-specific

Make sure momentary breakpoints are always thread-specific

This adds a new ctor to momentary_breakpoints with a few parameters
that are always necessary for momentary breakpoints.

In particular, I noticed that set_std_terminate_breakpoint doesn't
make the breakpoint be thread specific, which looks like a bug to me.

The point of that breakpoint is to intercept std::terminate calls that
happen as result of the called thread throwing an exception that won't
be caught by the dummy frame.  If some other thread calls
std::terminate, IMO, it's no different from some other thread calling
exit/_exit, for example.

Change-Id: Ifc5ff4a6d6e58b8c4854d00b86725382d38a1a02