[llvm] [Dexter] Use continue when resuming lldb execution to reach breakpoint (PR #156481)

[Orlando Cazalet-Hyams via llvm-commits]

OCHyams wrote:

Looking at the new output, Stephen's patch did fix the issue we were seeing at first. With that fixed, the bot has run into a new failure mode, which is much simpler. The "step index" numbers are different on that bot than on x86 / locally for some reason. Should be fixed in https://github.com/llvm/llvm-project/pull/156832

https://github.com/llvm/llvm-project/pull/156481