Patch AsyncStackTest.MixedStackWalk to work with the new <coroutine> header
Patch AsyncStackTest.MixedStackWalk to work with the new <coroutine> header

Summary: Depending on inlining of std library primitives (e.g. coroutine_handle) it's possible to have more frames in the stack trace.

Reviewed By: yfeldblum

Differential Revision: D26793792

fbshipit-source-id: 44fb1344353e29ec92559ee34740157373112f8f

facebook/folly,facebook/folly,facebook/folly,facebook/folly,facebook/folly