Sema/return.c test problem on Windows

[John_Thompson]

There’s no _longjmp defined in MSVC. Here’s one way to fix the failing Sema/return.c test:

Index: Sema/return.c

[Chris_Lattner]

There’s no _longjmp defined in MSVC. Here’s one way to fix the failing Sema/return.c test:

Sure, works for me.