[PATCH] Let user C-c when waiting for DWARF index finalization

[Tom Tromey]

Lancelot> I think the "ms" suffix from chrono_literals have been introduced in
Lancelot> c++14 which we do not support. 

Yeah, thanks for pointing that out.  I misread the cppreference page and
thought they were C++11.

Lancelot> I guess that something like this should work for c++11:

Lancelot>     std::chrono::milliseconds duration { 15 };

I've made this change.

Lancelot> I still have on my todo list to ensure that major distros do have a
Lancelot> decent and easily installable c++14 compiler so we can bump this
Lancelot> requirement in gdb, but I have not done this yet…

Yeah, that sounds nice.

Tom